https://developer.leapmotion.com/documentation/skeletal/javascript/api/Leap.Hand.html https://github.com/felixge/node-ar-drone https://github.com/leapmotion/leapjs
in general, right hand is the reference point. With your right hand steady, moving your left hand forward will bring the Drone forward.
put two hands into detection area
with less than 2 hands in detection zone
Left hand higher than right hand
Left hand lower than right hand
Left hand far from you, right hand close to you
Left hand close to you, right hand far from you
both left hand and right hand tilt left
both left hand and right hand tilt right
grab your left hand and flip left
grab your right hand and flip right