What you'll need:
Different colour threads
Start plaiting two strands of the leather string with one strand of the coloured thread.
When you have reached the desired length attach the claps to each end of the plaits.
It should now look something like this.
Now attach a chain link to either end with a hook clasp on one end.
After I made all three bracelets this is how they looked.
Voila! There you have it, my three leather plaited bracelets.