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2019/sketch_191229a/sketch_191229a.pyde

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+from random import shuffle
+from collections import namedtuple
+Ponto = namedtuple('Ponto', 'x y size, color')
+pontos = []
+
+def setup():
+    global bg
+    size(400, 400)
+    background(0)
+    colorMode(HSB)
+    bg = createGraphics(500, 500)
+    bg.beginDraw()
+    bg.textSize(140)
+    bg.text("Hello", 25, 250)
+    bg.endDraw()
+    set_points()
+    
+def set_points():
+    step = 10
+    i = 0
+    for y in range(0, width, step):
+        for x in range(0, width, step):
+            bc = bg.get(x, y)
+            if bc != 0:
+                i = (i + 1) % 256
+                c = color(i, 255, 255)
+                pontos.append(Ponto(x, y, random(5, 10), c))
+            else:
+                c = 32
+                # pontos.append(Ponto(x, y, random(5, 10), c))
+    shuffle(pontos)
+            
+def draw():
+    global a, v
+    background(0)
+    t = map(mouseX, 0, width, -1, 2)
+    for p0, p1 in zip(pontos, pontos[::-1]):
+        p_x, p_y = lerp(p0.x, p1.x, t), lerp(p0.y, p1.y, t)
+        p_size = lerp(p0.size, p1.size, t)
+        p_color = lerpColor(p0.color, p1.color, t)
+        fill(p_color, 200)
+        noStroke()
+        circle(p_x, p_y, p_size)
+
+def keyPressed():
+    if key == ' ':
+        background(0)
+        pontos[:] = []
+        set_points()