Alternate Lark’s Head Knot
You will want to tighten that up, but for now I will show you the next half of the knot which goes under, over, under.
Here is what it looks like cinched up:
Repeat on other side with cord closest to the holding cords. Work over, under, over and draw it up tight, then work under, over, under.
Here is the second knot finished:
Alternate sides. I worked with the outermost pink cord, then the outermost green cord. Here is a chain of Alternating Lark’s Head knots.