Grid Deformations
Because… reasons. (How my daughter answers questions.)
At http://mathhombre.tumblr.com/post/131821215449/grid-deformations-because-reasons-how-my
I have several examples. I like odd function visualizations. First couple I show have y-matters on vertical endpoints and x on horizontal, then I played with mixing and breaking symmetry.
mathjax.tumblr.com requested the source, so here it is!
More GGB at bit.ly/mh-ggb