1. Iteration: 7 Circles

2. Variables: A Parametric Triangle

3. Transformations + Functions: Critter

4. Nested Iteration With Functions: Repeated Motif
(VHS tapes: very subtle, but the tape on each one is randomly sized for length of film and whether it was rewinded/stopped in the middle of viewing.)

(And, alternatively):

5. Nested Iteration + Randomness Gradient: Recoding Schotter
