We had a sine at previous time... and today we continue with something similar. Circle and ellipse! Hypnotic animations, simple equations, a lot of code and math - yeah, we call it "procedural stuff". Prepare some cookies, tea and a sofa... Let's make some beauty!
Like this:

There is no common formulae and tricks. Let's concentrate on some specific things! Will be a lot of fun here. Because always we have really specific tasks like "do animation like that". So, let's try this stuff today too.