I know how to fill a space with a loop, filling row by row until I complete a square area field. But how can I fill an area, starting from the edges to the center?
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http://www.gameus.de/c2/test.capx
thank you! I was able to solve the problem using a very similar logic
https://orig00.deviantart.net/b3f1/f/2017/195/5/6/spiral_by_vubidugil-dbga57r.png