github-avatar.py

def setup():
    global seed
    seed = 0
    
    size(500, 500)
    frameRate(4)
    
    colorMode(HSB)

def draw():
    global seed
    background(0, 0, 245)
    noStroke()
    
    fill(0, 0, 255)
    rect(30, 30, 440, 440, 15, 15, 15, 15)
    
    tileSize = 400 / 5

    fill(random(255), random(25, 75), random(175, 225))
    for i in range(5):
        for j in range(3):
            if seed & (1 << (i * 3 + j)):
                rect(50 + tileSize * j, 50 + tileSize * i, tileSize, tileSize)
                rect(50 + tileSize * (4 - j), 50 + tileSize * i, tileSize, tileSize)
    
    seed = (seed + 1) % 2**15