Transparency

Move the pointer left and right across the image to change its position. This program overlays one image over another by modifying the alpha value of the image with the tint() function.

from p5 import *

img = None
offset = 0
easing = 0.05

def setup():
        global img
        size(720, 400)
        img = load_image("moonwalk.jpg")

def draw():
        global img, offset, easing

        image(img, 0, 0) #Display at full opacity

        dx = mouse_x - img.width / 2 - offset
        offset += dx * easing
        tint(255, 127)
        image(img, offset, 0)

if __name__ == '__main__':
        run()