On the snap, (3) cracks down, sealing off (2)’s defender from getting to the outside. (2) pulls around and serves as a lead blocker and takes care of (3)’s defender.
(1) takes a cpl of steps to the sideline while gaining depth into the backfield, and then opens his shoulders to the left to recieve the pass. Since he has gained depth into the backfield with his first two steps, the pass can hit him in a way that carries him upfield.
Once he has the ball he should “run the ladder”. Get upfield immediately as though he were going to split the blocks made by (2) and (3), drawing the man defending (3) to the inside and setting him up to not defend the sideline.
(2) should aim for the outside shoulder of the defender when making his block.
Remember, open hand pushes only for blocks, otherwise you will get flagged
Then (1) can bounce outside around the block, and the man defending (1) should have a tough time getthing through the mess to make the play.