Gather your supplies.
Take one of each color and cut into equal lengths.
Tie a knot at the end.
Secure the knot side to the table with a piece of tape or a heavy object.
Separate the first color you want on the bracelet.
Make a "4" with the string.
Loop it around the other two strings.
Pull from the end of the string so that it makes a knot at the top.
Keep making knots and alternate colors until you reach the Desired length.
Some more that I made.