Cut the elastic to the measurement. Be sure to add a couple centimeters or inches to your measurement to compensate for overlap.
Note that the colourful stripes on a resistor denote its value. For a 470 ohm the stripes on the left side of the resistor are yellow, purple, black, black and on the right side brown. When measuring out the wires, make you have enough slack to make it around the whole lens and then some.
This is the series circuit. Repeat this for all the series circuits, there are three. Refer back to the wiring diagram.