That's the front swing. Swing clockwise or counterclockwise to the left. . . If it's down, it's still ahead. When they appear at the same time, you can wave your left hand and right hand at the same time. However, the general dance machine should feel a little less intelligent. There is a situation where you don't wave. Generally speaking, electronic dance should be smarter to become famous. Or an updated DSS machine. . . . If it's still not good, please ask a mechanic to check it. In fact, the pedal and feel of the dance machine should generally not be very clever, which is determined by the structure of the machine. The scores are messy, too. You can try Dragon and Phoenix Dance (PIU Dance Machine). Although there are no hands, the music, pictures and pedals are all good, and the pedals light up as soon as they are stepped on. And the simple mode is slow and won't close the door.