Perfect Shuffle Visualization 3

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Perfect Shuffle Visualization
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combination of:
- Perfect Shuffle Visualization
http://wonderfl.net/code/bb7b5c2bfec888803f118cd47e3f727b00772b62
- Square to Donut
http://wonderfl.net/code/b2dbbb5b857c6ebd8ed4460e83338f3e5ce4abe8
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How many times does it requires for 15 cards to 
go back to where one started?
inspired by:
http://d.hatena.ne.jp/nishiohirokazu/20100107/1262835414