A Persian Carpet Cloth Simulation

[dbox]

Interesting @bplus, I'll have to add this one to my list of examples for testing performance improvements.  Here is a version that will run, although the rug looks wrong and it waves painfully slow:

View in QBJS

... and you found a bug for me.  Looks like the optional color parameter in the Line method isn't working when a value is specified for the style (e.g. B or BF).