ehdb_01_19_16_001.py

# Eli Heuer's daily DrawBot exercise!
# 01/19/16 -- 001
# Rendered with DrawBot:
# http://www.drawbot.com/
# This code started from this tutorial screencast: 
# https://vimeo.com/149247423
# Thanks to Just van Rossum

# setting up the canvas and main variables

canvas = 512          # size of the gif in pixels
square_size = 128     # size of the square
num_frames = 64       # number of frames in the animation

# main loop that makes each frame

for frame in range(num_frames):
    newPage(canvas, canvas)
    frameDuration(1/20)
    fill(0.8)
    rect(0, 0, canvas, canvas)
    phase = 2 * pi * frame / num_frames
    x_pos = 90 * sin(phase)
    y_pos = 90 * sin(phase + 0.5 * pi)
    translate(canvas/2, canvas/2)
    
    # animation loop
    
    for frame in range(num_frames):
        save()
        fill(1)
        stroke(0.2)
        rotate(frame*8)
        translate(x_pos, y_pos)
        rect(-square_size/2, -square_size/2, 
        square_size, square_size)
        restore()
    
saveImage("ehdb_01_19_16_002.gif")