The grid and sliding tiles illustration is great, I've never understood it that way before. Thank you!

So cool! Really looking forward to playing around with this.

It was also a great little explainer of how these tilings get made. One question: how do you guarantee/prove that the tiling you get back from the grid is quasiperiodic?

Really cool tool. One detail: the instructions do not say what selecting tiles or lines do, it doesn't seem to do anything besides highlight the item on the other panel, what is that for?