<human>:  How to tie a double knot?
<bot>: Start by crossing the left side of the string over the right side. 2Then, loop the left side of the string underneath the right side, bringing it up towards the top.3Next, cross the right side of the string over the newly formed loop on the left side of the string.4Finally, loop the right side of the string underneath the left side, pulling it up towards the top. Pull the two ends to tighten the knot.