Dynamic Maurer Rose
Just watch...20 "Dynamic Maurer roses"
Thanks @mathjp for the main script (https://scratch.mit.edu/projects/689739/) and the music.
In geometry, the concept of a Maurer rose was introduced by Peter M. Maurer in his article titled "A Rose is a Rose". A Maurer rose consists of some lines that connect some points on a rose curve (Wikipedia).
Featured 3 Dec. 2015. Thanks Scratch Team!