Rewrite tile_bottom_half() to generate ascii tile.
Rewrite tile_bottom_half() to generate ascii tile.

Remove pre-defined tiles EMPTY, SOLID, etc.

Extract fill_half_tile() function from tile_top_half().

donmccaughey/FiendsAndFortune,donmccaughey/FiendsAndFortune,donmccaughey/FiendsAndFortune