Basic homing projectile in ZScript.

Class CoolHomingFireball : DoomImpBall Replaces DoomImpBall //This fireball replaces all default Imp fireballs spawned.
{
	Default
	{
		+SeekerMissile; //Just a marker that this is a homing projectile, does nothing on its' own by default.
	}
	States
	{
		Spawn:
			BAL1 AB 4 Bright A_SeekerMissile(0.1,0.2);
			Loop;
	}
}