Braiding eight cords into a flat braid

Step 12: Braid left cord, then right cord

Take the 1st cord (the blue one in this case)and put it over the 2nd, under the 3rd and over the 4th.
Take the 8th cord (gray) and put it under the 7th, over the 6th, under the 5th and over 4th.
The colors are now gray, black, black, gray, blue, black, black, blue.