Last week i added some lights that shine through the chest. these are neo-pixel rgb addressable lights. which gives me a ton of options to be creative. currently i wrote a program to just act as a stand alone system on a arduino micro. There are 5 lights arranged in an x pattern. the lights glow red and dime and brighten over a 3 second period and then repeats. it really does give the feel that panda is breathing and has a human quality to him. i would like to make a heart beat program.