To do Rainbow Lunges, stand with your feet about shoulder-width apart. Pivot your feet into a lunge on your right side, facing to the right with your front heel down and back heel up.
Then jump up and swing your arms up and overhead as you pivot and switch into a lunge on the other side facing the other way. Your arms will create a “rainbow” as you pivot and jump from lunge to lunge.
Swing your arms down as you land in the lunge on your left leg. Then quickly jump back up and pivot to land in a lunge on your right side facing to your right. Remember to swing your arms up and overhead as you pivot. Make sure to pivot as you rotate in a lunge from side to side.