Here's one made in white cord.
monkey fist knot tied without a core. A larger version of this knot is often used to make a weighted heaving line that can be thrown across a gap between ships and then used to haul a heavier piece of line across the gap.
There are a pair of sliding barrel knots on either side of the reverse loops that secure the adjustment with a high friction grip. You can draw the running part thought he knot but it requires a bit of effort so this knot will hold the line in position where you leave it.
Here's a link, scroll down to "method 2" to see how this one is made.
Find a selection of these traditional rope bracelets here.
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