. Author manuscript; available in PMC: 2018 Oct 6.
Published in final edited form as: CSCW Conf Comput Support Coop Work. 2015 Mar;2015:143–153. doi: 10.1145/2675133.2675191
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Figure 4.
Pair play, light transitioning from red (left) to blue-violet (center) to white (right)