https://openlab.citytech.cuny.edu/spevackcomd1100fa2017/2017/12/11/color-interaction-pairings-phase-1-2/

https://openlab.citytech.cuny.edu/spevackcomd1100fa2017/2017/12/07/color-interaction-pairings-phase-2/

https://openlab.citytech.cuny.edu/spevackcomd1100fa2017/2017/12/11/color-interaction-pairings-phase-3/