The Rotating Laser Beams appear in the Animusic 1 songs "Future Retro" and "Stick Figures". A variation of this instrument can be seen in the Animusic 2 song "Heavy Light"
The Rotating Laser Beams are laser firing machines looped on various types of pipes/bars. The lasers can be red or purple.
While the lasers in "Future Retro" and "Stick Figures" can only move along pivot joints, the lasers in "Heavy Light" can rotate in nearly any direction in 3-dimensional space.