In the new fighting dance mode, the first four steps are arrows, followed by question marks. You need to remember the directions of the first four arrows, and then when the formal dance steps can be performed at the bottom, the first four? Press the keyboard according to the symbols you remember, and the ones behind you should jump as you like.
In the three-person fighting dance, everyone dances a period of personal synchronization, a period of memorizing symbols, and then a cycle of personal synchronization. There were hints before the storm.