The Tim Szetela piece I tried to recreate: https://www.instagram.com/p/CHQ5huzDUkV/
It looks like Tim used a Nested For Loop to clone and stack circles both horizontally and vertically. It also looks like he used rotate() in some way to make each individual circles circulate around its center. Based on this, I decided to use a Nested For Loop with multiple ellipses being stacked ontop of each other, using a color dropper to replicate the colors. I also used rotate() to make the circles circulate. For one of my modified sketches I changed the circles to squares and altered the rotation so all the squares circulated in the same direction. For the other modified sketch I changed the size and colors of the circles, making them bigger and brighter.