Looks for players or other attackable actors in the game. This function is similar to A_Look but it only reacts to sound. Just seeing the player will not wake up a monster using this. This function must be used in the idle states of a monster.
The three states after this function call are reserved. You must include these states because the function jumps to the states following the call. A_Look2 calls them randomly to animate actors using this function. The third of these states is only called when the STANDSTILL flag is not set.
If you do not need that, A_TurretLook is the better solution.
Spawn: PEAS A 10 A_Look2 Loop
As you can see it is very similar to the A_Look example.