Two balls. Extra players are behind 2 and 4 on the sidelines. 1 rebounds and outlets to 2, who comes back to meet the pass, dribbles fullcourt for a layup, 1 follows the pass to the back of the line. 3 and 4 do the same on the other side.
(Variation - 2 and 4 start at foul-line extended outlet spots, misdirect long for a pass, or misdirect and come back to the ball)
2 and 4 rebound their shots, outlet to the next player in line and follow their pass.
Continue, then change sides.
Progression - use 3 or 4 balls (option - start from one end).
See Layups - Pau (speed), Press break - Press-break layups, Fast break - 1 (secondary), Outlet and go.
b) Fill-behind shooting
1 outlets to 2, who drives and 1 fills behind, 3 and 4 do the same on the other side.
2 and 4 pass back for shots and get to weakside rebounding hot spots.
2 and 4 rebound, outlet and are the next shooters, 1 and 3 go off.
Continue, then switch sides.
See Fast break - Continuous flow, 2 (secondary).