Update rainbow generator script.
Update rainbow generator script.

kwagyeman/openmv,openmv/openmv,kwagyeman/openmv,iabdalkader/openmv,kwagyeman/openmv,kwagyeman/openmv,openmv/openmv,iabdalkader/openmv,iabdalkader/openmv,openmv/openmv,openmv/openmv,iabdalkader/openmv