Interactive video sketch

I wanted to trigger a video IED with a cell phone. I thought I could do so using Isadora. I wanted a electronic cell phone to computer trigger, there was none. I decided to use a sound trigger instead. This did not work well it diluted the interaction and function of the cell phone.
I thought about having the Boe-Bot draw a picture by having the robot drive through ink or paint and use the wheels as a brush. I thought this to be an obvious use of the Boe-Bot and one that had probably been used a million times so I abandoned the idea.