I am doing a project with my students. One of my students is trying to create a game, but when she makes her animation move the animation “stamps” itself with any movement it makes. It makes a trail behind it. However, when we did Unit 3 lessons none of the sprites there did that, I even tried starting my own and I run into the same issue. My animation leaves a trail with any movement it makes.
Are you using the background block to clear the background every time the draw loop runs? The draw loop does not erase what has drawn before, so if you don’t want to see the images that were drawn in the last loop, you have to cover them up with the background block.