import random


def rand_cord(width : int, height : int):
    """Pass width and heeight of the window
    Returns one random coordinate within given window space
    Steps by 20s
    """
    cord = []
    x = random.randrange(0,width - 19,20)
    y = random.randrange(0,height - 19,20)
    cord.append(x)
    cord.append(y)
    return cord