Scratch

First of all, I choose to post this post here because it sounds like a technical feature. This probably won't help any of you program any better, this is just a curious thing I noticed. I was making 64 costumes for a sprite that all looked almost exactly the same. They were all a circle with two lines drawn through them and they all were 32 by 32. The curious thing is that the first picture was 0.49 KB, the next was 0.47 KB, then 0.44, then 0.36, and so on, becoming worth less and less memory. They stopped becoming less when they became worth 0.06 KB (on the 17th costume). Why did they become less and less memory? Can Scratch remember costumes by using parts of other costumes? It just seemed strange. I don't expect any answers or comments, but I am hopeful. Summary: When you have many costumes that were almost exactly the same, why do the latter ones take up less memory?