THIS IS NOT THE ONLY WAY TO DO TRANSPARENCY. I'm ignoring any more comments telling me "oh use [insert program here] instead" because NOT EVERYONE HAS THESE PROGRAMS. I use MS Paint to make my sprites, and it doesn't support transparency, hence the second method I show.
I don't mind if you tell me of other methods, but don't chastise me because "oh you're changing the background color that's stupid" because IT'S AN ALTERNATIVE.
Any more of these complaints and I'll eventually just disable comments, because I don't want people bitching at me that "oh your way is pointless and stupid" all the damn time.