You will get this achievement after finishing the third puzzle. After watching the tutorial, place the reflectors on the board to make the green energy beam go into the green receiver and the red energy beam into the red receiver. And then bam! achievment! :D
And here's the completed puzzle.
Props to THEICEMANCOMETH For the idea of putting in a pic.
And sorry to those of you that couldn't get it from the last pic. I accidentally put the wrong pic in there. Thank you STORM SHAKER for pointing it out!