See:
    LAVD A 0 bright A_CustomMissile("firestep",0,-5,0)
    LAVD A 6 bright {
        A_Chase();
		       if (waterlevel > 0)
            A_ChangeFlag("NOGRAVITY",true);
        else
            A_ChangeFlag("NOGRAVITY",false);
        A_CustomMissile("firestep",0,-5,0);
    }
    LAVD B 0 bright A_jump(128,1)
    LAVD B 0 bright A_CustomMissile("IceGuyWisp1",70,0)
    LAVD B 6 bright{
	A_Chase();
	if (waterlevel > 0)
            A_ChangeFlag("NOGRAVITY",true);
        else
            A_ChangeFlag("NOGRAVITY",false);
	}
    LAVD C 0 bright A_CustomMissile("firestep",0,7,0)
    LAVD C 6 bright{
	A_Chase();
	if (waterlevel > 0)
            A_ChangeFlag("NOGRAVITY",true);
        else
            A_ChangeFlag("NOGRAVITY",false);
	}

    LAVD D 0 bright A_jump(128,1)
    LAVD D 0 bright A_CustomMissile("IceGuyWisp2",70,0)
    LAVD D 6 bright {
		A_Chase();
	if (waterlevel > 0)
            A_ChangeFlag("NOGRAVITY",true);
        else
            A_ChangeFlag("NOGRAVITY",false);
	}
    loop