We went to our local hardware store and bought a long eight foot piece of wood. We then got four wooden square slabs and nailed them together to form a box. We then inserted our rainbow laminated color paper and nailed that to the box. We then measured the distance from the box, at different lengths. We started at 2 feet, then 4 feet, 6 feet, and lastly 8 feet. We took pictures from those different lengths on underwater cameras.