U will need three prices of fabric. Two that you like, and the third can be whatever, because you wont see it. For the other two, you'll need different fabrics, otherwise the pattern won't be visible.
Make sure the one you don't care about is in the middle
Loop the left one like so
And pull tight to the top
Then do the same to the right
Pulling the strand upwards to tighten it
Then do it again on the left strand
If you don't understand yet, hopefully this video will help
So here's what it looks like after a while
When you're done, tie it around your wrist or ankle, and enjoy! I hoped you like it!