Looking at the script helps but see below for a key:
Green - Means MA difference is positive and accelerating i.e., getting larger. Bright green means price is over both MAs for those periods, Light green means it is in between and dark green means it is below
Blue, Cyan and Orange - means MA difference is positive but decelerating. Cyan means price is over both MAs for that period, blue means its below and Orangemeans it is in between.
Dark Red, Light Red, and Red - Means MA difference is negative and decelerating i,e., getting larger. Dark_red means price is below both MAs, light_red means it is between and red means its is above
Yellow,Pink, and Magenta - Means MA difference is negative and accelerating i.e., getting smaller. Yellow means price is over both MAs, yellow means it is in between and magenta means it is below both MAs.
The purpose was to get a better feel for when MA crossover was going to happen. If you just had one color for positive or negative differences you could never really tell when it was about to turn other than plotting them on the upper chart which defeats the purpose of the lower study.