This is a paint program i created without the use of command blocks. With this program you have the ability to draw an image on the screen, hit the "save" button, and clear the screen and draw something else. You can load your saved image at any time. It has been made incredibly simple to make things like this with the introduction of new commands semi-recently, which is why this is unique. I have a video on this that i made on my channel if you want more information on it.