I've coded some myself once, but there are plenty of tutorials out there.
For instance, Shaun himself made a tutorial about it once:
https://www.youtube.com/watch?v=kexl6kF0EfMAlso, here's an article if you rather read than watch:
http://blog.cowboycolor.com/binary-auto ... ame-maker/
I've coded some myself once, but there are plenty of tutorials out there.
For instance, Shaun himself made a tutorial about it once: https://www.youtube.com/watch?v=kexl6kF0EfM
Also, here's an article if you rather read than watch: http://blog.cowboycolor.com/binary-auto-tiling-in-game-maker/