I used four of the colours on this example..... two on the left of the blade and two on the right and I got lucky on the first try as if you watch this example closely you will see the brightest grey sequence
four times in order
https://i.imgur.com/e8hPLsY.mp4
And that is the effect I have been working toward and NO, the sequence speed is fixed and cannot be made faster for one animation without speeding up them all
The next step is getting the yellow to follow the same patern