Dear all,

I have a partial differential equation on a square and because of the
symmetry of the problem, instead I'm solving equation on the triangle
with appropriately changed boundary conditions.
For visualisation purposes I want to re-create full square composed from
8 triangles.

What is the simplest way to achieve it? I can always go with an image
editor, but this is not the route I'd wish to take (and also, this way
it would be hard to automate).

Sincerely,
George


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