movingSquare.py

# HI DAVE!

import math

canvas = 500
squareSize = 100

startPos = 0
endPos = 400

frameRate = 24
duration = 2000 # in milliseconds

frames = int(duration / frameRate)

print(frames)

for frame in range(frames):
    pos = -(endPos-startPos)/2 * (math.cos(math.pi*frame/frames*2)-1)

    newPage(canvas, canvas)
    frameDuration(1/frameRate) # moving that to after newPage to avoid having a first black frame

    fill(1)
    rect(0, 0, width(), height())
    
    save()
    fill(0,0,0)
    translate(pos, 0)
    rect(0, 0, squareSize, squareSize)
    restore()
    
    # page count
    fill(0)
    textBox("{}".format(pageCount()), (canvas-220, 20, 200, 20), align="right")

saveImage('moving square.gif')
#saveImage('moving square.mp4)