Hello, I have just started with processing, and I really like it. I have a problem though, when I try to move these ellipses, they leave behind streaks. I am stumped about what could be causing this.

I am storing the data in an array of Circle objects, and each Circle object has a PVector which stores the position data. Each time draw() runs, it increments the PVector data of every Circle object. Smooth movement works fine, it's just the streaks that are giving me trouble. Thanks for any suggestions.