I made 1 in dark light blue for my nephew. diy friendship bracelet loop this is from purlbee.com oh my goodness they listed all the instructions and pictures too boot! Really like the site! She used regular yarn not thread.
How to make cool bracelets with string-Really easy friendship bracelet patterns by wanting
I used to make these as a teenager. 13 Awesome DIY Projects - DIY Friendship Bracelets