"RED" Screen is a real or actual ball screen

RED is code for "REAL"

The ball handler is hoping to penetrate and the screener rolls. The action itself creates a basket or a drive and kick, or a pass to roller for score.

"Blue" Screen is fake ball screen, there is no real intention of using the ball screen itself. Player 1 is passing out of the ball screen. Player 5 does not roll nor pop.

BLUE is code for "Bullsh*t"

Instead, Player 5 follows behind player 1 as they dribble then pass and immediately sets flare screen.

4 passes to 1 who has shot or drive