Notepad is the best editor :)
-1-1-2-2-3-2-3-1-1-
2222222222222222222
3434343434343434343
etc.
- empty space
1-4 bricks
and you can edit 60 levels/hour :)
-1-1-2-2-3-2-3-1-1-
2222222222222222222
3434343434343434343
etc.
- empty space
1-4 bricks
and you can edit 60 levels/hour :)