Do you wanna see some crazy Moiré patterns?
Professor Tadashi Tokieda, from one of my favourite Youtube channels Numberphile, show in this video how you can create some really cool visual effects when you rotate, scale or change the axis of some patterns on top of each other.
I recomend to watch the video, then come back and have a play.
Here is what you need to do:
First, pick one of the 4 patterns.
Set it size, is easy to see the effets with a small value, just don't go too small.
After creating it, change some of the values, like rotate or size.
In the end, press play to see the animation.
Eg: Choose Triangles, size 4, press Create then set Rotate to 180 and hit Play.