Players and equipment are arranged as shown. 
For the optimal implementation, 12 players can take part in the exercise. 4 of them are placed in the middle of the square the others are located in the four corners outside. 
Of course the soccer drill can work with more players, but the pace of the execution can slow down.
This soccer passing exercise is performed in both directions.

Players perform this soccer passing exercise with 2 balls and they must play with one touch. 
The players move free in the square but they must always be playable so that the progress will be continuous.
After the players perform one-touch combination in one of the corners, they change their positions immediately, so the outside player runs into the square and orientates to be able to step into play. The inside player runs to the corner.