Your First Game from Scratch: The Pong Game - Learn GameSalad for iOS: Game Development for iPhone, iPad, and HTML5 - page 57

Figure 2-28. Serving rule
Now you can do the same for Rack Player 2 with the following modification:
 In the condition of Attribute game. P1Serving is false.
 Spawn Actor is the ball and the position is -16 (to spawn the
ball on the left side of the racket).
Figure 2-29 shows the Serving rule for Rack Player 2.
Figure 2-29. Serving Rule for Rack Player 2