Gently open one of the end loops with a pair of chain nose pliers and round nose pliers, adding it to the bookmark finding and close.
Work the drop beading from the bottom link up, start by adding 1 bead of each of the 4 colors on head pins. Start a loop on each and add them to the bottom link, in no particular order, closing each one with wraps.
Continue the random mix or develop your own pattern and add 2 bead drops to each side of the link, each with 1 bead. Add the drops to every other link, up to the book mark finding.
Add 4 more beaded drops to the loop of the bookmark to finish.