sliced light in color

This project is a extension to the project i had done before
http://www.thingiverse.com/thing:359754
I upgraded the project to do light painting in full color. I attached a 5mmRGB led to micro platform of my 3dr delta using a proper attachment. The RGB led is attached to the pins 4,5,6 on the ramps board. Also this time i wanted the camera to start and stop automatically as it is painful holding the shutter release button for a ful 4 minutes . I attached the shutter release button to the ra