Youtube presentation on how to draw lines by drawing 3 flags.
In English:
http://www.youtube.com/watch?v=kIPS98bkMVA
In French:
http://www.youtube.com/watch?v=eI0lM37_jxw
The 3 programs written:
Indonesian flag:
https://c.gethopscotch.com/p/w1p7ztj
Blangladesh flag:
https://c.gethopscotch.com/p/j4qtxkd
French flag:
https://c.gethopscotch.com/p/yyyq-ri