On whistle F1 has puck. D1 engages and battles with F1. F1 is trying to move up and down the wall with control of the puck using their feet (work on pushing off the boards/creating separation etc). D1 is trying to separate F1 from the puck to allow for a quick reverse breakout to D2.
D2 is timing/watching/reading the battle and cheating towards the battle (in this scenario we're pretending the RW would have come low to offer net front support to allow for D2 to cheat towards the battle).
D1 moves puck to D2 behind the net - D2 wheels to find O1 (would be RW in game). O1 skates backwards to blueline and opens up for shot.
Meanwhile F1 is trying to get to the net to screen. D1 is battling to prevent F1 to get to the net and D2 is now recovering back to the net to support/help D1.
Let F1/D1 battle it out until D1 finally wins battle. Don't add pucks to "keep drill moving".

Tags: D2 read/cheat/anticipate/communicate, D1 don't smash puck away - make a play, D1 - listen to D partner, Both recover back to the front of the net