It's a multi-function push button! Caution, its a little slow :) (button is at bottom left corner)
Here's how to use it:
1. Hold down for 1sec, red LED lights up for a moment
2. Hold down for 2sec, green LED will flash
3. Hold down for 2sec. again, green LED stops flashing
4. Hold Down for 3sec, blue LED lights up for a moment
*Newer, more advanced version coming soon*
Feel free to share any ideas!!!