@marce11a pretty much! You just need to fold your strings in half and ‘hook’ the two colours through each other at the middle point. I recommend doing this string by string for the least lumpy finished look. It’s a bit of a pain to do without a stable work surface, but the end produce is quite worth it!
@minutcraft So you put all the green strings on one side, with the green half of the loop, and all the white strings on the other, with the white half of the loop?