Animated Concentric Circles remake of book cover (DrawBot script)

ConcentricCircles2024.py

# In honor of https://www.instagram.com/p/C_iATyCiGu0/
# John Hinton / Dying (Pelican originals; Studies in social pathology)
# Designer unknown


def circle(x, y, d):
    r = d / 2
    oval(x - r, y - r, d, d)


canvasSize = 1080
margin = 0.02 * canvasSize
diameter = canvasSize - 2 * margin
numCircles = 48
step = diameter / (2 * numCircles)
numFrames = 120

colors = [
    (0,),
    (
        1,
        0.95,
        0.9,
    ),
]


for frame in range(numFrames):
    t = frame / numFrames
    newPage(canvasSize, canvasSize)
    frameDuration(1 / 30)

    # background
    fill(0.75, 0, 0.25)
    rect(0, 0, canvasSize, canvasSize)

    translate(canvasSize / 2, canvasSize / 2)

    offsetfactor = -cos(tau * t)

    for i in range(numCircles):
        f = 1 - i / (numCircles)
        d = f * diameter

        fill(*colors[i % 2])
        offset = step if not i % 2 else 0
        circle(offsetfactor * offset, 0, d + 0.7 * offset)


saveImage("ConcentricCircles2024.mp4")