diff --git a/2019/sketch_190208a/exported.gif b/2019/sketch_190208a/exported.gif
new file mode 100644
index 00000000..c2290ea5
Binary files /dev/null and b/2019/sketch_190208a/exported.gif differ
diff --git a/2019/sketch_190211a/arcs.py b/2019/sketch_190211a/arcs.py
new file mode 100644
index 00000000..3a9c1c5b
--- /dev/null
+++ b/2019/sketch_190211a/arcs.py
@@ -0,0 +1,148 @@
+# -*- coding: utf-8 -*-
+
+ROTATION = {0: 0,
+            BOTTOM: 0,
+            DOWN: 0,
+            1: HALF_PI,
+            LEFT: HALF_PI,
+            2: PI,
+            TOP: PI,
+            UP: PI,
+            3: PI + HALF_PI,
+            RIGHT: PI + HALF_PI,
+            BOTTOM + RIGHT: 0,
+            DOWN + RIGHT: 0,
+            DOWN + LEFT: HALF_PI,
+            BOTTOM + LEFT: HALF_PI,
+            TOP + LEFT: PI,
+            UP + LEFT: PI,
+            TOP + RIGHT: PI + HALF_PI,
+            UP + RIGHT: PI + HALF_PI,
+            }
+
+def quarter_circle(x, y, radius, quadrant):
+    circle_arc(x, y, radius, ROTATION[quadrant], HALF_PI)
+
+def half_circle(x, y, radius, quadrant):
+    circle_arc(x, y, radius, ROTATION[quadrant], PI)
+
+def circle_arc(x, y, radius, start_ang, sweep_ang):
+    arc(x, y, radius * 2, radius * 2, start_ang, start_ang + sweep_ang)
+
+def poly_arc(x, y, radius, start_ang, sweep_ang, num_points=2):
+    angle = sweep_ang / int(num_points)
+    a = start_ang
+    with beginShape():
+        while a <= start_ang + sweep_ang:
+            sx = x + cos(a) * radius
+            sy = y + sin(a) * radius
+            vertex(sx, sy)
+            a += angle
+
+def arc_poly(x, y, d, _, start_ang, end_ang, num_points=5):
+    sweep_ang = end_ang - start_ang
+    angle = sweep_ang / int(num_points)
+    a = start_ang
+    with beginShape():
+        while a <= end_ang:
+            sx = x + cos(a) * d / 2
+            sy = y + sin(a) * d / 2
+            vertex(sx, sy)
+            a += angle
+
+def bar(x1, y1, x2, y2, thickness=None, shorter=0, ends=(1, 1)):
+    """
+    O código para fazer as barras, dois pares (x, y),
+    um parâmetro de encurtamento: shorter
+    """
+    L = dist(x1, y1, x2, y2)
+    if not thickness:
+        thickness = 10
+    with pushMatrix():
+        translate(x1, y1)
+        angle = atan2(x1 - x2, y2 - y1)
+        rotate(angle)
+        offset = shorter / 2
+        line(thickness / 2, offset, thickness / 2, L - offset)
+        line(-thickness / 2, offset, -thickness / 2, L - offset)
+        if ends[0]:
+            half_circle(0, offset, thickness / 2, UP)
+        if ends[1]:
+            half_circle(0, L - offset, thickness / 2, DOWN)
+
+def var_bar(p1x, p1y, p2x, p2y, r1, r2=None):
+    if r2 is None:
+        r2 = r1
+    d = dist(p1x, p1y, p2x, p2y)
+    if d > 0:
+        with pushMatrix():
+            translate(p1x, p1y)
+            angle = atan2(p1x - p2x, p2y - p1y)
+            rotate(angle + HALF_PI)
+            ri = r1 - r2
+            beta = asin(ri / d) + HALF_PI
+            x1 = cos(beta) * r1
+            y1 = sin(beta) * r1
+            x2 = cos(beta) * r2
+            y2 = sin(beta) * r2
+            # with pushStyle():
+            # noStroke()
+            # beginShape()
+            # vertex(-x1, -y1)
+            # vertex(d - x2, -y2)
+            # vertex(d, 0)
+            #      #vertex(d - x2, +y2, 0)
+            #      #vertex(-x1, +y1, 0)
+            #      #vertex(0, 0, 0)
+            # endShape()
+            line(-x1, -y1, d - x2, -y2)
+            line(-x1, +y1, d - x2, +y2)
+            arc(0, 0, r1 * 2, r1 * 2,
+                -beta - PI, beta - PI)
+            arc(d, 0, r2 * 2, r2 * 2,
+                beta - PI, PI - beta)
+    else:
+        ellipse(p1x, p1y, r1 * 2, r1 * 2)
+        ellipse(p2y, p2x, r2 * 2, r2 * 2)
+        
+        
+def poly_rounded(P, r0, r1=None, r2=None):
+    r1 = r0 if not r1 else r1
+    r2 = r0 if not r2 else r2
+    a = [0] * 3
+    d, d1, d2 = 2 * r0, 2 * r1, 2 * r2
+
+    a[0] = atan2(P[1].y - P[0].y, P[1].x - P[0].x) - HALF_PI
+    a[1] = atan2(P[2].y - P[1].y, P[2].x - P[1].x) - HALF_PI
+    a[2] = atan2(P[0].y - P[2].y, P[0].x - P[2].x) - HALF_PI
+
+    start = a[2] if a[2] < a[0] else a[2] - TWO_PI
+    arc(P[0].x, P[0].y, d, d, start, a[0])
+    start = a[0] if a[0] < a[1] else a[0] - TWO_PI
+    arc(P[1].x, P[1].y, d1, d1, start, a[1])
+    start = a[1] if a[1] < a[2] else a[1] - TWO_PI
+    arc(P[2].x, P[2].y, d2, d2, start, a[2])
+
+    p01 = PVector(P[0].x + r0 * cos(a[0]), P[0].y + r0 * sin(a[0]))
+    p10 = PVector(P[1].x + r1 * cos(a[0]), P[1].y + r1 * sin(a[0]))
+    p12 = PVector(P[1].x + r1 * cos(a[1]), P[1].y + r1 * sin(a[1]))
+    p21 = PVector(P[2].x + r2 * cos(a[1]), P[2].y + r2 * sin(a[1]))
+    p20 = PVector(P[2].x + r2 * cos(a[2]), P[2].y + r2 * sin(a[2]))
+    p02 = PVector(P[0].x + r0 * cos(a[2]), P[0].y + r0 * sin(a[2]))
+
+    with pushStyle():
+        noStroke()
+        with beginClosedShape():
+            vertex(P[0].x, P[0].y)
+            vertex(p02.x, p02.y)
+            vertex(p20.x, p20.y)
+            vertex(P[2].x, P[2].y)
+            vertex(p21.x, p21.y)
+            vertex(p12.x, p12.y)
+            vertex(P[1].x, P[1].y)
+            vertex(p10.x, p10.y)
+            vertex(p01.x, p01.y)
+
+    line(p01.x, p01.y, p10.x, p10.y)
+    line(p12.x, p12.y, p21.x, p21.y)
+    line(p20.x, p20.y, p02.x, p02.y)
diff --git a/2019/sketch_190211a/gif_exporter.py b/2019/sketch_190211a/gif_exporter.py
new file mode 100644
index 00000000..51c431df
--- /dev/null
+++ b/2019/sketch_190211a/gif_exporter.py
@@ -0,0 +1,40 @@
+"""
+Alexandre B A Villares http://abav.lugaralgum.com - GPL v3 
+
+A helper for the Processing gifAnimation library https://github.com/extrapixel/gif-animation/tree/3.0
+Download from https://github.com/villares/processing-play/blob/master/export_GIF/unzip_and_move_to_libraries_GifAnimation.zip
+This helper was inspired by an example by Art Simon https://github.com/APCSPrinciples/AnimatedGIF/
+
+# add at the start of your sketch:
+  add_library('gifAnimation')
+  from gif_exporter import gif_export
+# add at the end of draw():
+  gif_export(GifMaker)
+"""
+
+def gif_export(GifMaker,             # gets a reference to the library
+               filename="exported",  # .gif will be added
+               repeat=0,             # 0 makes it an "endless" animation
+               quality=255,          # quality range 0 - 255
+               delay=200,            # this is quick
+               frames=0,             # 0 will stop on keyPressed or frameCount >= 100000
+               finish=False):        # force stop
+    global gifExporter
+    try:
+        gifExporter
+    except NameError:
+        gifExporter = GifMaker(this, filename + ".gif")
+        gifExporter.setRepeat(repeat)
+        gifExporter.setQuality(quality)
+        gifExporter.setDelay(delay)
+        
+    gifExporter.addFrame()
+
+    if frames == 0:
+       if keyPressed and key == "e":
+           finish = True
+                
+    if finish:
+        gifExporter.finish()
+        print("gif saved")
+        exit()
diff --git a/2019/sketch_190211a/sketch_190211a.gif b/2019/sketch_190211a/sketch_190211a.gif
new file mode 100644
index 00000000..de9bea61
Binary files /dev/null and b/2019/sketch_190211a/sketch_190211a.gif differ
diff --git a/2019/sketch_190211a/sketch_190211a.pyde b/2019/sketch_190211a/sketch_190211a.pyde
new file mode 100644
index 00000000..fd66d86e
--- /dev/null
+++ b/2019/sketch_190211a/sketch_190211a.pyde
@@ -0,0 +1,153 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+SKETCH_NAME, OUTPUT = "sketch_190211a", ".png"
+
+"""
+New rounded poly take
+"""
+from collections import namedtuple
+import copy as cp
+add_library('GifAnimation')
+from gif_exporter import gif_export
+#add_library('peasycam')
+from arcs import var_bar, poly_rounded
+import random as rnd
+
+SPACING, MARGIN = 100, 100
+X_LIST, Y_LIST = [], []  # listas de posições para elementos
+desenho_atual, outro_desenho, desenho_inter, desenho_inicial = [], [], [], []
+NUM_NODES = 5  # número de elementos do desenho / number of nodes
+Node = namedtuple(
+    'Node', 'x y t_size s_weight is_special points_to')
+save_frames = False
+
+def setup():
+    smooth(16)
+    size(600, 600)
+    colorMode(HSB)
+    rectMode(CENTER)
+    noFill()
+    #cam = PeasyCam(this, 500)
+    X_LIST[:] = [x for x in range(MARGIN, 1 + width - MARGIN, SPACING)]
+    Y_LIST[:] = [y for y in range(MARGIN, 1 + height - MARGIN, SPACING)]
+    novo_desenho(desenho_atual)
+    desenho_inicial[:] = cp.deepcopy(desenho_atual)
+    println("'s' to save, and 'n' for a new drawing")
+
+def keyPressed():
+    global save_frames
+    if key == 'g':
+        gif_export(GifMaker)
+        # saveFrame("####.png")
+        # save_frames = not save_frames
+        # print "Saving "+repr(save_frames)
+    if key == 'r':
+        make_nodes_point(desenho_atual)
+    if key == 'n':
+        novo_desenho(desenho_atual)
+    if key == ' ':
+        background(200)
+
+def novo_desenho(desenho):
+    """
+    esvazia a lista elementos (setas e linhas) do desenho anterior
+    clears the list of nodes and creates a a new drawing appending desenho_atual,
+    a list of nodes/drawing elements: specials, connecting lines and lonely nodes
+    """
+    desenho[:] = []
+    for _ in range(NUM_NODES):
+        desenho.append(new_node())
+    make_nodes_point(desenho)
+    outro_desenho[:] = cp.deepcopy(desenho)
+    make_nodes_point(outro_desenho)
+
+
+def new_node():
+    return Node(                   # elemento/"nó" uma namedtuple com:
+        rnd.choice(X_LIST),        # x
+        rnd.choice(Y_LIST),        # y
+        rnd.choice([10, 20, 30]),  # t_size (tail/circle size)
+        rnd.choice([2, 4, 6]),     # s_weight
+        # rnd.choice([True, False]),  # is_special? (se é seta ou 'linha')
+        True,
+        []  # points_to... (lista com ref. a outro elem.))
+    )
+
+def make_nodes_point(desenho):
+    for node in desenho:  # para cada elemento do desenho
+        node.points_to[:] = []
+        random_node = rnd.choice(desenho)  # sorteia o,utro elemento
+        node.points_to.append(random_node)
+        random_node = rnd.choice(desenho)  # sorteia o,utro elemento
+        node.points_to.append(random_node)
+
+
+def draw():
+    #translate(-width/2, -height/2)
+    global desenho_atual, outro_desenho
+    background(0)
+    desenho = desenho_atual
+    # fc = frameCount % 300 - 150
+    # if fc < 0:
+    #     desenho = desenho_atual
+    # elif 0 <= fc < 149:
+    #     # if frameCount % 10 == 0:.
+    #     make_inter_nodes(map(fc, 0, 150, 0, 1))
+    #     desenho = desenho_inter
+    # elif fc == 149:
+    #     desenho_atual, outro_desenho = outro_desenho, desenho_atual
+    #     desenho = desenho_atual
+    #     if not mousePressed:
+    #         make_nodes_point(outro_desenho)
+    #         print("will reset")
+    #     else:
+    #         outro_desenho[:] = cp.deepcopy(desenho_inicial)
+
+    # then draws black specials
+    for node in (n for n in desenho if n.is_special):
+            p1, p2 = node.points_to  # se estiver apontando para alguém
+            # strokeWeight(node.s_weight)
+            with pushMatrix():
+                for i in range(1):
+                    stroke(48 + i * 8, 200, 200)
+                    translate(0, 0, node.s_weight)
+                    poly_rounded([node, p1, p2], node.s_weight * 5)
+                    # var_bar(node.x, node.y, p1.x, p1.y,
+                    #         node.t_size - i + node.t_size *
+                    #         cos(node.x + frameCount / 100.)
+                    #         ,node.s_weight * 5-i + node.s_weight *
+                    #         sin(node.y + frameCount / 120.))
+
+    #if frameCount % 4 == 0:
+        #saveFrame("####.tga")
+
+
+# def make_inter_nodes(amt):
+#     desenho_inter[:] = []
+#     for n1, n2 in zip(desenho_atual, outro_desenho):
+#         if n1.points_to:
+#             p1x, p1y = n1.points_to[0].x, n1.points_to[0].y
+#         else:
+#             p1x, p1y = n1.x, n1.y
+#         if n2.points_to:
+#             p2x, p2y = n2.points_to[0].x, n2.points_to[0].y
+#         else:
+#             p2x, p2y = n2.x, n2.y
+#         desenho_inter.append(Node(                   # elemento/"nó" uma namedtuple com:
+#             n1.x,        # x
+#             n1.y,        # y
+#             n1.t_size,  # t_size (tail/circle size)
+#             n1.s_weight,     # s_weight (espessura da linha)
+#             n1.is_special,  # is_special? (se é barra ou 'linha')
+#             # cp.deepcopy(n1.points_to)
+#             [PVector(lerp(p1x, p2x, amt), lerp(p1y, p2y, amt))]
+#         ))
+
+# print text to add to the project's README.md
+def settings():
+    println(
+        """
+![{0}](2019/{0}/{0}{1})
+
+[{0}](https://github.com/villares/sketch-a-day/tree/master/2019/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+""".format(SKETCH_NAME, OUTPUT)
+    )
diff --git a/2019/sketch_190211b/arcs.py b/2019/sketch_190211b/arcs.py
new file mode 100644
index 00000000..3a9c1c5b
--- /dev/null
+++ b/2019/sketch_190211b/arcs.py
@@ -0,0 +1,148 @@
+# -*- coding: utf-8 -*-
+
+ROTATION = {0: 0,
+            BOTTOM: 0,
+            DOWN: 0,
+            1: HALF_PI,
+            LEFT: HALF_PI,
+            2: PI,
+            TOP: PI,
+            UP: PI,
+            3: PI + HALF_PI,
+            RIGHT: PI + HALF_PI,
+            BOTTOM + RIGHT: 0,
+            DOWN + RIGHT: 0,
+            DOWN + LEFT: HALF_PI,
+            BOTTOM + LEFT: HALF_PI,
+            TOP + LEFT: PI,
+            UP + LEFT: PI,
+            TOP + RIGHT: PI + HALF_PI,
+            UP + RIGHT: PI + HALF_PI,
+            }
+
+def quarter_circle(x, y, radius, quadrant):
+    circle_arc(x, y, radius, ROTATION[quadrant], HALF_PI)
+
+def half_circle(x, y, radius, quadrant):
+    circle_arc(x, y, radius, ROTATION[quadrant], PI)
+
+def circle_arc(x, y, radius, start_ang, sweep_ang):
+    arc(x, y, radius * 2, radius * 2, start_ang, start_ang + sweep_ang)
+
+def poly_arc(x, y, radius, start_ang, sweep_ang, num_points=2):
+    angle = sweep_ang / int(num_points)
+    a = start_ang
+    with beginShape():
+        while a <= start_ang + sweep_ang:
+            sx = x + cos(a) * radius
+            sy = y + sin(a) * radius
+            vertex(sx, sy)
+            a += angle
+
+def arc_poly(x, y, d, _, start_ang, end_ang, num_points=5):
+    sweep_ang = end_ang - start_ang
+    angle = sweep_ang / int(num_points)
+    a = start_ang
+    with beginShape():
+        while a <= end_ang:
+            sx = x + cos(a) * d / 2
+            sy = y + sin(a) * d / 2
+            vertex(sx, sy)
+            a += angle
+
+def bar(x1, y1, x2, y2, thickness=None, shorter=0, ends=(1, 1)):
+    """
+    O código para fazer as barras, dois pares (x, y),
+    um parâmetro de encurtamento: shorter
+    """
+    L = dist(x1, y1, x2, y2)
+    if not thickness:
+        thickness = 10
+    with pushMatrix():
+        translate(x1, y1)
+        angle = atan2(x1 - x2, y2 - y1)
+        rotate(angle)
+        offset = shorter / 2
+        line(thickness / 2, offset, thickness / 2, L - offset)
+        line(-thickness / 2, offset, -thickness / 2, L - offset)
+        if ends[0]:
+            half_circle(0, offset, thickness / 2, UP)
+        if ends[1]:
+            half_circle(0, L - offset, thickness / 2, DOWN)
+
+def var_bar(p1x, p1y, p2x, p2y, r1, r2=None):
+    if r2 is None:
+        r2 = r1
+    d = dist(p1x, p1y, p2x, p2y)
+    if d > 0:
+        with pushMatrix():
+            translate(p1x, p1y)
+            angle = atan2(p1x - p2x, p2y - p1y)
+            rotate(angle + HALF_PI)
+            ri = r1 - r2
+            beta = asin(ri / d) + HALF_PI
+            x1 = cos(beta) * r1
+            y1 = sin(beta) * r1
+            x2 = cos(beta) * r2
+            y2 = sin(beta) * r2
+            # with pushStyle():
+            # noStroke()
+            # beginShape()
+            # vertex(-x1, -y1)
+            # vertex(d - x2, -y2)
+            # vertex(d, 0)
+            #      #vertex(d - x2, +y2, 0)
+            #      #vertex(-x1, +y1, 0)
+            #      #vertex(0, 0, 0)
+            # endShape()
+            line(-x1, -y1, d - x2, -y2)
+            line(-x1, +y1, d - x2, +y2)
+            arc(0, 0, r1 * 2, r1 * 2,
+                -beta - PI, beta - PI)
+            arc(d, 0, r2 * 2, r2 * 2,
+                beta - PI, PI - beta)
+    else:
+        ellipse(p1x, p1y, r1 * 2, r1 * 2)
+        ellipse(p2y, p2x, r2 * 2, r2 * 2)
+        
+        
+def poly_rounded(P, r0, r1=None, r2=None):
+    r1 = r0 if not r1 else r1
+    r2 = r0 if not r2 else r2
+    a = [0] * 3
+    d, d1, d2 = 2 * r0, 2 * r1, 2 * r2
+
+    a[0] = atan2(P[1].y - P[0].y, P[1].x - P[0].x) - HALF_PI
+    a[1] = atan2(P[2].y - P[1].y, P[2].x - P[1].x) - HALF_PI
+    a[2] = atan2(P[0].y - P[2].y, P[0].x - P[2].x) - HALF_PI
+
+    start = a[2] if a[2] < a[0] else a[2] - TWO_PI
+    arc(P[0].x, P[0].y, d, d, start, a[0])
+    start = a[0] if a[0] < a[1] else a[0] - TWO_PI
+    arc(P[1].x, P[1].y, d1, d1, start, a[1])
+    start = a[1] if a[1] < a[2] else a[1] - TWO_PI
+    arc(P[2].x, P[2].y, d2, d2, start, a[2])
+
+    p01 = PVector(P[0].x + r0 * cos(a[0]), P[0].y + r0 * sin(a[0]))
+    p10 = PVector(P[1].x + r1 * cos(a[0]), P[1].y + r1 * sin(a[0]))
+    p12 = PVector(P[1].x + r1 * cos(a[1]), P[1].y + r1 * sin(a[1]))
+    p21 = PVector(P[2].x + r2 * cos(a[1]), P[2].y + r2 * sin(a[1]))
+    p20 = PVector(P[2].x + r2 * cos(a[2]), P[2].y + r2 * sin(a[2]))
+    p02 = PVector(P[0].x + r0 * cos(a[2]), P[0].y + r0 * sin(a[2]))
+
+    with pushStyle():
+        noStroke()
+        with beginClosedShape():
+            vertex(P[0].x, P[0].y)
+            vertex(p02.x, p02.y)
+            vertex(p20.x, p20.y)
+            vertex(P[2].x, P[2].y)
+            vertex(p21.x, p21.y)
+            vertex(p12.x, p12.y)
+            vertex(P[1].x, P[1].y)
+            vertex(p10.x, p10.y)
+            vertex(p01.x, p01.y)
+
+    line(p01.x, p01.y, p10.x, p10.y)
+    line(p12.x, p12.y, p21.x, p21.y)
+    line(p20.x, p20.y, p02.x, p02.y)
diff --git a/2019/sketch_190211b/gif_exporter.py b/2019/sketch_190211b/gif_exporter.py
new file mode 100644
index 00000000..439c4118
--- /dev/null
+++ b/2019/sketch_190211b/gif_exporter.py
@@ -0,0 +1,40 @@
+"""
+Alexandre B A Villares http://abav.lugaralgum.com - GPL v3 
+
+A helper for the Processing gifAnimation library https://github.com/extrapixel/gif-animation/tree/3.0
+Download from https://github.com/villares/processing-play/blob/master/export_GIF/unzip_and_move_to_libraries_GifAnimation.zip
+This helper was inspired by an example by Art Simon https://github.com/APCSPrinciples/AnimatedGIF/
+
+# add at the start of your sketch:
+  add_library('gifAnimation')
+  from gif_exporter import gif_export
+# add at the end of draw():
+  gif_export(GifMaker)
+"""
+
+def gif_export(GifMaker,             # gets a reference to the library
+               filename="exported",  # .gif will be added
+               repeat=0,             # 0 makes it an "endless" animation
+               quality=255,          # quality range 0 - 255
+               delay=1200,            # this is quick
+               frames=0,             # 0 will stop on keyPressed or frameCount >= 100000
+               finish=False):        # force stop
+    global gifExporter
+    try:
+        gifExporter
+    except NameError:
+        gifExporter = GifMaker(this, filename + ".gif")
+        gifExporter.setRepeat(repeat)
+        gifExporter.setQuality(quality)
+        gifExporter.setDelay(delay)
+        
+    gifExporter.addFrame()
+
+    if frames == 0:
+       if keyPressed and key == "e":
+           finish = True
+                
+    if finish:
+        gifExporter.finish()
+        print("gif saved")
+        exit()
diff --git a/2019/sketch_190211b/sketch_190211b.gif b/2019/sketch_190211b/sketch_190211b.gif
new file mode 100644
index 00000000..cfe875ed
Binary files /dev/null and b/2019/sketch_190211b/sketch_190211b.gif differ
diff --git a/2019/sketch_190211b/sketch_190211b.pyde b/2019/sketch_190211b/sketch_190211b.pyde
new file mode 100644
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--- /dev/null
+++ b/2019/sketch_190211b/sketch_190211b.pyde
@@ -0,0 +1,153 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+SKETCH_NAME, OUTPUT = "sketch_190211b", ".gif"
+
+"""
+New rounded poly take
+"""
+from collections import namedtuple
+import copy as cp
+add_library('GifAnimation')
+from gif_exporter import gif_export
+#add_library('peasycam')
+from arcs import var_bar, poly_rounded
+import random as rnd
+
+SPACING, MARGIN = 100, 100
+X_LIST, Y_LIST = [], []  # listas de posições para elementos
+desenho_atual, outro_desenho, desenho_inter, desenho_inicial = [], [], [], []
+NUM_NODES = 5  # número de elementos do desenho / number of nodes
+Node = namedtuple(
+    'Node', 'x y t_size s_weight is_special points_to')
+save_frames = False
+
+def setup():
+    smooth(16)
+    size(600, 600)
+    colorMode(HSB)
+    rectMode(CENTER)
+    noFill()
+    #cam = PeasyCam(this, 500)
+    X_LIST[:] = [x for x in range(MARGIN, 1 + width - MARGIN, SPACING)]
+    Y_LIST[:] = [y for y in range(MARGIN, 1 + height - MARGIN, SPACING)]
+    novo_desenho(desenho_atual)
+    desenho_inicial[:] = cp.deepcopy(desenho_atual)
+    println("'s' to save, and 'n' for a new drawing")
+
+def keyPressed():
+    global save_frames
+    if key == 'g':
+        gif_export(GifMaker, filename=SKETCH_NAME)
+        # saveFrame("####.png")
+        # save_frames = not save_frames
+        # print "Saving "+repr(save_frames)
+    if key == 'r':
+        make_nodes_point(desenho_atual)
+    if key == 'n':
+        novo_desenho(desenho_atual)
+    if key == ' ':
+        background(200)
+
+def novo_desenho(desenho):
+    """
+    esvazia a lista elementos (setas e linhas) do desenho anterior
+    clears the list of nodes and creates a a new drawing appending desenho_atual,
+    a list of nodes/drawing elements: specials, connecting lines and lonely nodes
+    """
+    desenho[:] = []
+    for _ in range(NUM_NODES):
+        desenho.append(new_node())
+    make_nodes_point(desenho)
+    outro_desenho[:] = cp.deepcopy(desenho)
+    make_nodes_point(outro_desenho)
+
+
+def new_node():
+    return Node(                   # elemento/"nó" uma namedtuple com:
+        rnd.choice(X_LIST),        # x
+        rnd.choice(Y_LIST),        # y
+        rnd.choice([10, 20, 30]),  # t_size (tail/circle size)
+        rnd.choice([2, 4, 6]),     # s_weight
+        # rnd.choice([True, False]),  # is_special? (se é seta ou 'linha')
+        True,
+        []  # points_to... (lista com ref. a outro elem.))
+    )
+
+def make_nodes_point(desenho):
+    for node in desenho:  # para cada elemento do desenho
+        node.points_to[:] = []
+        random_node = rnd.choice(desenho)  # sorteia o,utro elemento
+        node.points_to.append(random_node)
+        random_node = rnd.choice(desenho)  # sorteia o,utro elemento
+        node.points_to.append(random_node)
+
+
+def draw():
+    #translate(-width/2, -height/2)
+    global desenho_atual, outro_desenho
+    background(0)
+    desenho = desenho_atual
+    # fc = frameCount % 300 - 150
+    # if fc < 0:
+    #     desenho = desenho_atual
+    # elif 0 <= fc < 149:
+    #     # if frameCount % 10 == 0:.
+    #     make_inter_nodes(map(fc, 0, 150, 0, 1))
+    #     desenho = desenho_inter
+    # elif fc == 149:
+    #     desenho_atual, outro_desenho = outro_desenho, desenho_atual
+    #     desenho = desenho_atual
+    #     if not mousePressed:
+    #         make_nodes_point(outro_desenho)
+    #         print("will reset")
+    #     else:
+    #         outro_desenho[:] = cp.deepcopy(desenho_inicial)
+
+    # then draws black specials
+    for node in (n for n in desenho if n.is_special):
+            p1, p2 = node.points_to  # se estiver apontando para alguém
+            # strokeWeight(node.s_weight)
+            with pushMatrix():
+                for i in range(-2, 3):
+                    stroke(48 + i * 8, 200, 200)
+                    translate(0, 0, node.s_weight)
+                    poly_rounded([node, p1, p2], (node.s_weight + i)* 5)
+                    # var_bar(node.x, node.y, p1.x, p1.y,
+                    #         node.t_size - i + node.t_size *
+                    #         cos(node.x + frameCount / 100.)
+                    #         ,node.s_weight * 5-i + node.s_weight *
+                    #         sin(node.y + frameCount / 120.))
+
+    #if frameCount % 4 == 0:
+        #saveFrame("####.tga")
+
+
+# def make_inter_nodes(amt):
+#     desenho_inter[:] = []
+#     for n1, n2 in zip(desenho_atual, outro_desenho):
+#         if n1.points_to:
+#             p1x, p1y = n1.points_to[0].x, n1.points_to[0].y
+#         else:
+#             p1x, p1y = n1.x, n1.y
+#         if n2.points_to:
+#             p2x, p2y = n2.points_to[0].x, n2.points_to[0].y
+#         else:
+#             p2x, p2y = n2.x, n2.y
+#         desenho_inter.append(Node(                   # elemento/"nó" uma namedtuple com:
+#             n1.x,        # x
+#             n1.y,        # y
+#             n1.t_size,  # t_size (tail/circle size)
+#             n1.s_weight,     # s_weight (espessura da linha)
+#             n1.is_special,  # is_special? (se é barra ou 'linha')
+#             # cp.deepcopy(n1.points_to)
+#             [PVector(lerp(p1x, p2x, amt), lerp(p1y, p2y, amt))]
+#         ))
+
+# print text to add to the project's README.md
+def settings():
+    println(
+        """
+![{0}](2019/{0}/{0}{1})
+
+[{0}](https://github.com/villares/sketch-a-day/tree/master/2019/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+""".format(SKETCH_NAME, OUTPUT)
+    )