Yeah I use 4 separate Pt-On commands per tile.
I was originally doing 8 per tile and filling the entire tile with color, but that ended up being too slow
to be playable. I also found a way using 5 Pt-On's that let me do fully-filled 11x11 tiles, but I still
wanted the tiles to be bigger (and it was still a bit too slow). On the bright side, it made the method
for displaying the cursor an easy choice, so I didn't have to think too hard about how to do that. It's
just another 4 Pt-On(s, but with a different point type.