Dance and Lights

I stumbled upon this video today. I enjoyed watching it. While watching it amaed my mind also was busy thinking about how the choreographer did this thing. Probably they master the dance routine first then the dancers are filmed performing the dance without the lights. Graphic artists are then tasked to create the light effects based on the video of the dance routine. Now when what the graphic artists created is projected on the stage it would fit the routine perfectly. Looks complicated but it is actually easy.