I spent forever writing an explanation. And I lost it. Anyway, I'll explain it in a nutshell. Sprites are game graphics, you can use Paint.Net to make sprites and sprite sheets, it's a popular choice, and you can use sprites from the sprites page in Game Setup. Anyway, sprite sheets contain frames to make an animation. By placing the sprites correctly, you can make an animation. I explained all this in great detail, and I will probably make a video tutorial on it soon, and I'm not willing ATM to write a full detailed thing. Until then, just install Paint.Net, (the .Net isn't a website, it's the program's name) and just get good at drawing. If you want sprites right now, I can make some for you. Just PM me what you want, and I'll get it to you by Tuesday. Hopefully Monday.