diff --git a/2019/sketch_190424a/sketch_190424a.png b/2019/sketch_190424a/sketch_190424a.png
new file mode 100644
index 00000000..cf87d37a
Binary files /dev/null and b/2019/sketch_190424a/sketch_190424a.png differ
diff --git a/2019/sketch_190424a/sketch_190424a.pyde b/2019/sketch_190424a/sketch_190424a.pyde
index 95891898..120de907 100644
--- a/2019/sketch_190424a/sketch_190424a.pyde
+++ b/2019/sketch_190424a/sketch_190424a.pyde
@@ -84,7 +84,7 @@ def keyPressed():
     # if key == "g":
     #     gif_export(GifMaker, filename=SKETCH_NAME)
     if key == "s":
-        saveFrame(SKETCH_NAME + "#.png")
+        saveFrame(SKETCH_NAME + ".png")
     if key == "t":
         Poly.text_on = not Poly.text_on
 
diff --git a/2019/sketch_190424b/172.png b/2019/sketch_190424b/172.png
new file mode 100644
index 00000000..1e3adf91
Binary files /dev/null and b/2019/sketch_190424b/172.png differ
diff --git a/2019/sketch_190424b/sketch_190424b.pyde b/2019/sketch_190424b/sketch_190424b.pyde
index beb5a211..33110eca 100644
--- a/2019/sketch_190424b/sketch_190424b.pyde
+++ b/2019/sketch_190424b/sketch_190424b.pyde
@@ -1,4 +1,5 @@
 from __future__ import division
+
 order = 9
 
 def setup():
@@ -22,10 +23,9 @@ def draw():
 def draw_trit(trit):
     r = 8
     for t in trit:
-        tn = int(t)
-        if tn == 0:
+        if t == '0':
             rect(0, 0, r, r)
-        elif tn == 1:
+        elif t == '1':
             rect(0, 0, r/2, r*2)
         else:
             rect(0, 0, r*2, r/2)
@@ -49,3 +49,16 @@ def trit(n, pad):
 
 def keyPressed():
     saveFrame("###.png")
+    
+def settings():
+    from os import path
+    global SKETCH_NAME
+    SKETCH_NAME = path.basename(sketchPath())
+    OUTPUT = ".png"
+    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_190425a/gif_exporter.py b/2019/sketch_190425a/gif_exporter.py
new file mode 100644
index 00000000..51c431df
--- /dev/null
+++ b/2019/sketch_190425a/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_190425a/poly.py b/2019/sketch_190425a/poly.py
new file mode 100644
index 00000000..5fb2ae00
--- /dev/null
+++ b/2019/sketch_190425a/poly.py
@@ -0,0 +1,118 @@
+
+class Poly():
+
+    text_on = False
+    drag = -1
+    drag_hole = -1
+    drag_drag_pt = -1
+
+    def __init__(self, outer_pts, holes=[[(0, 0)]]):
+        self.outer_pts = outer_pts
+        self.holes = holes
+    
+    @classmethod
+    def setup_grid(cls, cell_size, order, x_offset, y_offset):
+        cls.cell_size = cell_size
+        cls.order = order
+        cls.x_offset, cls.y_offset = x_offset, y_offset
+
+    def plot(self):
+        pushStyle()
+        if len(self.outer_pts) >= 3:
+            fill(255)
+            beginShape()
+            for x, y in self.outer_pts:
+                stroke(0)
+                sx = (x + Poly.x_offset) * Poly.cell_size
+                sy = (y + Poly.y_offset) * Poly.cell_size
+                vertex(sx, sy)
+            for h in self.holes:
+                beginContour()
+                for x, y in h:
+                    sx = (x + Poly.x_offset) * Poly.cell_size
+                    sy = (y + Poly.y_offset) * Poly.cell_size
+                    vertex(sx, sy)
+                endContour()
+            endShape(CLOSE)
+        Poly.annotate_pts(self.outer_pts, color(200, 0, 0), 5)
+        Poly.annotate_pts(self.holes[0], color(0, 0, 200), 5)
+        popStyle()
+
+    def remove_pt(self):
+        snap = Poly.mouse_snap()
+        if snap:
+          for pt in self.outer_pts:
+            if pt == snap:
+                self.outer_pts.remove(pt)
+                return True
+            for h in self.holes:
+                for pt in h:
+                    if pt == snap:
+                        h.remove(pt)
+                        return True
+
+    def set_drag(self): #, io, jo):
+        snap = Poly.mouse_snap()
+        if snap:
+            for ipt, pt in enumerate(self.outer_pts):
+                if pt == snap: #(io, jo):
+                    Poly.drag_pt = ipt
+                    return True
+            for ih, h in enumerate(self.holes):
+                for ipt, pt in enumerate(h):
+                    if pt == snap: #(io, jo):
+                        Poly.drag_hole = ih
+                        Poly.drag_pt = ipt
+                        return True
+        return False
+    
+    @classmethod
+    def annotate_pts(cls, pts, c, scale_m=1):
+        if Poly.text_on:
+            strokeWeight(5)
+            textSize(12)
+            fill(c)
+            stroke(c)
+            for i, j in pts:
+                x = (i + cls.x_offset) * cls.cell_size
+                y = (j + cls.y_offset) * cls.cell_size
+                point(x, y)
+                text(str((i * scale_m, j * scale_m)), x, y)
+
+    @classmethod
+    def draw_grid(cls):
+        stroke(128)
+        noFill()
+        for x in range(cls.order):
+            for y in range(cls.order):
+                rect(x * cls.cell_size, y * cls.cell_size,
+                     cls.cell_size, cls.cell_size)
+
+    @staticmethod
+    def clockwise_sort(xy_pairs):
+        # https://stackoverflow.com/questions/51074984/sorting-according-to-clockwise-point-coordinates
+        data_len = len(xy_pairs)
+        if data_len > 2:
+            x, y = zip(*xy_pairs)
+        else:
+            return xy_pairs
+        centroid_x, centroid_y = sum(x) / data_len, sum(y) / data_len
+        xy_sorted = sorted(xy_pairs,
+                           key=lambda p: atan2((p[1] - centroid_y), (p[0] - centroid_x)))
+        xy_sorted_xy = [
+            coord for pair in list(zip(*xy_sorted)) for coord in pair]
+        half_len = int(len(xy_sorted_xy) / 2)
+        return list(zip(xy_sorted_xy[:half_len], xy_sorted_xy[half_len:]))
+    
+    @classmethod
+    def mouse_snap(cls):
+        for i in range(Poly.order):
+            x = i * Poly.cell_size
+            for j in range(Poly.order):
+                y = j * Poly.cell_size
+                io, jo = i - Poly.x_offset, j - Poly.y_offset  # grid origin correction
+                if dist(mouseX, mouseY, x, y) < Poly.cell_size / 2:
+                    return (io, jo)
+        return None
+                
+    
diff --git a/2019/sketch_190425a/sketch_190425a.pyde b/2019/sketch_190425a/sketch_190425a.pyde
new file mode 100644
index 00000000..95891898
--- /dev/null
+++ b/2019/sketch_190425a/sketch_190425a.pyde
@@ -0,0 +1,102 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
+"""
+A minimal poly editor
+- Add points
+"""
+
+from poly import Poly
+# add_library('GifAnimation')
+# from gif_exporter import gif_export
+
+# f_pts = [map(lambda x: x / 5 - 12, pair) for pair in f_pts]
+polys = [Poly([(2, 2), (2, 4), (4, 4), (4, 2)]),
+         Poly([(5, 5), (5, 7), (3, 3)]),
+         Poly([(-8, -7), (-1, 0), (1, -9)],
+              holes=[[(-4, -4), (-6, -6), (-1, -7)], ]),
+         ]
+
+def setup():
+    size(500, 500, P2D)
+    CELL_SIZE = 25
+    order = width / CELL_SIZE
+    x_offset = y_offset = int(order / 2)
+    Poly.setup_grid(CELL_SIZE, order, x_offset, y_offset)
+    Poly.text_on = False
+    strokeJoin(ROUND)
+    f = createFont("Fira Mono Bold", 16)
+    textFont(f)
+
+def draw():
+    background(230)
+    # grade
+    Poly.draw_grid()
+    # polígonos
+    for p in polys:
+        p.plot()
+
+def mousePressed():
+    if keyPressed and keyCode == CONTROL:
+        for p in polys:
+            if p.remove_pt():  # io, jo):
+                return
+    else:
+        for ip, p in enumerate(polys):
+            if p.set_drag():  # io, jo):
+                Poly.drag = ip
+                return
+
+def mouseDragged():
+    if Poly.drag >= 0 and not keyPressed:
+        # a Poly point has been selected to be dragged
+        # and no modifier key is pressed...
+        if Poly.drag_hole == -1:  # if no hole wase selected
+            polys[Poly.drag].outer_pts[Poly.drag_pt] = (
+                int(mouseX / Poly.cell_size) - Poly.x_offset,
+                int(mouseY / Poly.cell_size) - Poly.y_offset)
+        else:
+            polys[Poly.drag].holes[Poly.drag_hole][Poly.drag_pt] = (
+                int(mouseX / Poly.cell_size) - Poly.x_offset,
+                int(mouseY / Poly.cell_size) - Poly.y_offset)
+
+def mouseReleased():
+    if Poly.drag >= 0 and keyPressed and keyCode == SHIFT:
+        # a Poly point has been selected to be dragged
+        # and SHIFT key is pressed...
+        if Poly.drag_hole == -1:  # if no hole wase selected
+            polys[Poly.drag].outer_pts.insert(
+                Poly.drag_pt, (int(mouseX / Poly.cell_size) - Poly.x_offset,
+                               int(mouseY / Poly.cell_size) - Poly.y_offset))
+        else:
+            polys[Poly.drag].holes[Poly.drag_hole].insert(
+                Poly.drag_pt, (int(mouseX / Poly.cell_size) - Poly.x_offset,
+                               int(mouseY / Poly.cell_size) - Poly.y_offset))
+
+    Poly.drag = -1  # No poly selected
+    Poly.drag_hole = -1  # No hole selected
+    Poly.drag_pt = -1  # No point selected
+
+def keyPressed():
+    if key == " ":
+        for p in polys:
+            p.outer_pts[:] = Poly.clockwise_sort(p.outer_pts)
+            for h in p.holes:
+                h[:] = Poly.clockwise_sort(h)[::-1]
+    # if key == "g":
+    #     gif_export(GifMaker, filename=SKETCH_NAME)
+    if key == "s":
+        saveFrame(SKETCH_NAME + "#.png")
+    if key == "t":
+        Poly.text_on = not Poly.text_on
+
+def settings():
+    from os import path
+    global SKETCH_NAME
+    SKETCH_NAME = path.basename(sketchPath())
+    OUTPUT = ".png"
+    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_190425b/278.png b/2019/sketch_190425b/278.png
new file mode 100644
index 00000000..c627d09b
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diff --git a/2019/sketch_190425b/458.png b/2019/sketch_190425b/458.png
new file mode 100644
index 00000000..b8846f0b
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diff --git a/2019/sketch_190425b/598.png b/2019/sketch_190425b/598.png
new file mode 100644
index 00000000..572d04fc
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diff --git a/2019/sketch_190425b/773.png b/2019/sketch_190425b/773.png
new file mode 100644
index 00000000..4d7afc1a
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diff --git a/2019/sketch_190425b/sketch_190425b.pyde b/2019/sketch_190425b/sketch_190425b.pyde
new file mode 100644
index 00000000..9c5d4e7e
--- /dev/null
+++ b/2019/sketch_190425b/sketch_190425b.pyde
@@ -0,0 +1,101 @@
+from __future__ import division
+
+order = 9
+p = 4
+alt = False
+
+
+def setup():
+    size(700, 700)
+    noFill()  # fill(0)
+    textAlign(CENTER, CENTER)
+    rectMode(CENTER)
+    strokeWeight(2)
+    colorMode(HSB)
+
+def draw():
+    background(240)
+    siz = width / order
+    if alt:
+        grid(siz, draw_tritB)
+    else:
+        grid(siz, draw_tritA)
+
+def grid(siz, func):
+    i = 0
+    for x in range(order):
+        for y in range(order):
+            with pushMatrix():
+                translate(siz / 2 + x * siz,
+                          siz / 2 + y * siz)
+                #text(trit(i, pad=4), 0, 0)
+                func(trit(i, pad=p))
+            i += 1
+
+def draw_tritA(trit):
+    r = 32
+    for t in trit:
+        if t == '0':
+            stroke(0, 255, 128)
+            rect(0, 0, r, r)
+        elif t == '1':
+            stroke(256 / 3 * 2, 255, 128)
+            rect(0, 0, r / 2, r * 2)
+        else:
+            stroke(256 / 3, 255, 128)
+            rect(0, 0, r * 2, r / 2)
+        r -= 8
+
+def draw_tritB(trit):
+    r = 32
+    for t in trit:
+        stroke(8 + r * 7, 255, 128)
+        if t == '0':
+            rect(0, 0, r, r)
+        elif t == '1':
+            rect(0, 0, r / 2, r * 2)
+        else:
+            rect(0, 0, r * 2, r / 2)
+        r -= 8
+
+def to_base(num, base):
+    # inverse of int(str, base)
+    BS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    result = ""
+    while num:
+        result += BS[num % base]
+        num //= base
+    return result[::-1] or "0"
+
+def trit(n, pad):
+    s = to_base(n, 3)
+    while len(s) < pad:
+        s = "0" + s
+    return s[::-1]
+
+
+def keyPressed():
+    global alt, p
+
+    if key == "s":
+        saveFrame("###.png")
+
+    if key == "a":
+        alt = not alt
+        
+    if key == "p":
+        p = (p - 1) % 5
+
+
+def settings():
+    from os import path
+    global SKETCH_NAME
+    SKETCH_NAME = path.basename(sketchPath())
+    OUTPUT = ".png"
+    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/README.md b/README.md
index 215010af..e4aa499e 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,26 @@ Get updates from my sort-of-weekly newsletter: [[sketch-mail](https://villares.o
 ---
 
 ## 2019
+
+---
+
+
+![sketch_190425b](2019/sketch_190425b/sketch_190425b.png)
+
+[sketch_190425b](https://github.com/villares/sketch-a-day/tree/master/2019/sketch_190425b)  [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+---
+
+![sketch_190424b](2019/sketch_190424b/sketch_190424b.png)
+
+[sketch_190424b](https://github.com/villares/sketch-a-day/tree/master/2019/sketch_190424b) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+---
+
+![sketch_190424a](2019/sketch_190424a/sketch_190424a.png)
+
+[sketch_190424a](https://github.com/villares/sketch-a-day/tree/master/2019/sketch_190424a) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
 ---
 
 ![sketch_190423a](2019/sketch_190423a/sketch_190423a.png)
diff --git a/sketch_190425b.gif b/sketch_190425b.gif
new file mode 100644
index 00000000..d9855059
Binary files /dev/null and b/sketch_190425b.gif differ