Paper Folding

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A piece of A4 paper, orange on one side, brown on the other, is folded by moving its lower-left corner.
Contributed by: Borut Levart (March 2011)
Suggested by: John A. Boerger
Open content licensed under CC BY-NC-SA
Snapshots
Details
The gray areas represent the boundary to where the locator can be moved, should at least some of the paper remain at the initial position and the crease be formed.
The checkbox shows a text message below the paper.
Permanent Citation
"Paper Folding"
http://demonstrations.wolfram.com/PaperFolding/
Wolfram Demonstrations Project
Published: March 7 2011