Oops, forgot about that. input something other than 0 at start to create a new picture, save/load doesn't really work unless you haven't done anything since the last time you used it.
So steps
1: Input a number other than 0
2: Input dimensions (width is left/right distance, length is up/down distance)
3: arrows to move cursor, 2nd to change pixel, [CLEAR] to clear the sprite, [ENTER] to load sprite, [MODE] to see options. (to select an option press that number key)
4: it will store the pixel values to L1 and L2 and it assumes that you have the same window settings as the program sets.