Play the old Shanghai alley game (seeking the game flow)

We draw a four-story building on a flat rectangular ground with a length of 4 meters and a width of 2 meters, and then jump on one foot or two feet according to the arrangement of the building grid, and then return to the starting point after completion. A classmate kicked the brick out of the house; Another student stepped on the line with one foot when jumping; Sometimes I jump on the wrong floor, so I have to jump again. In the end, XX was powerful and took less time to win the competition.