For the synthesis, Stephanie and I implemented a physical analog input into our previous p5.js projects. For Steph's project, we used an FSR to simulate her rain sketch. The harder the FSR is pressed, the more the rain falls.
As for my project, I used a potentiometer to control my "Repetition" p5.js sketch. (https://alpha.editor.p5js.org/projects/SyZG0BV6)
I had some trouble setting up the connectivity between the Arduino and the p5 library, but eventually got it after some troubleshooting. In the original sketch, I controlled the animation by holding and releasing the mouse button. After reading the values from the analog input of the potentiometer, I changed the original code of the sketch to control the animation based off those physical variables.