qzdoom/wadsrc/static/zscript/hexen/bats.txt

// Bat Spawner --------------------------------------------------------------

class BatSpawner : SwitchableDecoration
{
	Default
	{
		+NOBLOCKMAP +NOSECTOR +NOGRAVITY
		RenderStyle "None";
	}

	native void A_BatSpawnInit();
	native void A_BatSpawn();

	States
	{
	Spawn:
	Active:
		TNT1 A 2;
		TNT1 A 2 A_BatSpawnInit;
		TNT1 A 2 A_BatSpawn;
		Wait;
	Inactive:
		TNT1 A -1;
		Stop;
	}
}

// Bat ----------------------------------------------------------------------

class Bat : Actor
{
	Default
	{
		Speed 5;
		Radius 3;
		Height 3;
		+NOBLOCKMAP +NOGRAVITY +MISSILE
		+NOTELEPORT +CANPASS
	}

	native void A_BatMove();

	States
	{
	Spawn:
		ABAT ABC 2 A_BatMove;
		Loop;
	Death:
		ABAT A 2;
		Stop;
	}
}