Initial setup for the box.
2 starts cutting towards 3 while still looking for the IO, 4 starts coming in to fill the opening up handler space, 3 comes across into 4's space.
If 4 does not get the swing, they clear the handler space by cutting towards 2, while still looking for an IO. 3 starts coming into the handler space, while 2 cuts across the field to clear space for 4.
Enter step description...