O1 passes to O2 and follows the pass to the spot behind O2.
O2 takes the first touch across the body toward O3, then passes to O3 and follows. O4 steps up to the first cone.
O3 opens up to see O4, passes and follows the pass. O1 steps up to the top cone.
O4 passes to O1 and follows. O2 steps up to the third cone.
O1 has the ball and the pattern repeats. After a minute or so, send the ball the other way so players use the other foot.