Jugglers needed (base version): 4 good
The diagrams do not show a complete cycle, but will suffice to show the
concept behind the pattern. Concentrating only on juggler A, we can say
A passes to the juggler across from him (C), changes places with the juggler next to him (B), makes another pass to C, then turns 90 degrees to change partners and begin the cycle again.
When studying with the movements, it becomes clear that if A goes behind once (red arrow, figure 1), he will pass through in front the next time (red arrow, figure 3).
4-count (every other). It's also possible to do a 6-count while changing positions.