Cheerlights are controlled by twitter, tweeting @cheerlights and then a colour will turn everybody’s cheerlights in the world the same colour.
For example tweeting @cheerlights red will turn the lights red globally, the colours available are Red,Green,Blue,Cyan,White,WarmWhite,Purple,Pink,Oldlace,Magenta,yellow and Orange so lots to choose from.
The current cheerlight status can be seen here -:
This years Cheerlights is being controlled by a Arduino, Ethernet shield and the FASTLED library. The LEDS this year are WS8211 addressable leds, so instead of just a solid colour change , you should see a gradual change over the 100 leds in the chain.
The code is available on github here. The original code is available here.
I altered the original code slightly to allow for WS8211 led’s and a variable to adjust the transition speed of the LED’s