Build passing accuracy through a target, with enough repetition at each corner for a correction to actually take hold. Three exchanges per pair means a player gets immediate second and third attempts at the same pass.
Mark a square about twelve metres across with a gate of two markers at each corner. Five players. A pair at one corner exchanges three passes through their gate, then the ball is played on to the next corner where a new pair takes over. Work round the square in one direction, then reverse. Every pass must go through a gate, not around it. Two touch, one touch once it flows.
Passing accuracy is usually trained one repetition at a time. A player passes, the ball goes elsewhere, and by the time it comes back to him he has forgotten the small thing he was going to change. Corrections do not stick that way, because there is never a second attempt while the first is still fresh.
Three consecutive exchanges at each corner fixes that cheaply. A player who puts the first ball wide of the gate gets to try again immediately, and again after that, which is when adjustments actually happen. The instruction that the second and third should be better than the first sounds obvious and is worth saying out loud, because otherwise players simply repeat the same pass three times and move on.
The gates make the accuracy measurable, which is the other half of it. A pass that goes vaguely toward a teammate is impossible to grade, but a pass that goes through a gate or does not is unambiguous, and players self-correct without a coach saying anything. The cue that changes most of them is aiming at the gap rather than at the person, because looking at the receiver pulls the ball toward whichever marker is in the eye line.
Moving the work rather than the players is what keeps five people busy in a twelve metre square. Nobody queues, nobody jogs to the back of a line, and the next pair has to be alert because the ball arrives whether they are ready or not. That small pressure is worth more than it looks in an otherwise gentle technical exercise.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.