Video of L-System
A little failure in my logic. I switched the book example which use GL_NEVER and GL_NOTEQUAL. This made the mask subtractive. I changed it to GL_ALWAYS and GL_EQUALS which worked except it was drawing the mask thus the white lines in the previous posts picture. I changed it to GL_NEVER (never draw the mask) and GL_EQUALS (be additive) and it works. Enjoy the video.
Second video recording on a CRT. Some of the code modded by Dylan Moore. The CRT does not flash. I will have figure out why there is a flicker.