Width and Height

The width and height variables contain the width and height of the display window as defined in the size() function.

from p5 import *

def setup():
        size(640, 360)

def draw():
        background(127)
        no_stroke()

        for i in range(0, height, 20):
                fill(129, 206, 15)
                rect((0, i), width, 10)
                fill(255)
                rect((i, 0), 10, height)

if __name__ == '__main__':
    run()