Groups of 3 form 3m triangle around the post. (A) and (B) have a ball. Use both ends if available.
(A) simulates setting for a shot and holds this position, meanwhile (B & C) perform a (1 - 2 -3) passing sequence, initiated by (B)
1-2-3 pass will be (B to C, C to B, B to C)
The passes between (B & C) must be lightning fast so (A) doesn't break held ball rule.
Instead of shooting, (A) passes to (B). (B) now becomes the player who fakes the shot, while (C & A) perform the (1 - 2 -3) passing sequence.
The third time around will be (C) faking the shot while (A & B) pass, completing the loop.
Sub-on next group of 3 (if required) after 1 minute.