begin TR_act_m3_770_lant_script

float timer
short sound
; global short TR_m3_OE_MainGate

if ( MenuMode )
	return
endif

if ( TR_m3_OE_MainGMove )
	if ( sound )
	else
		set sound to 1
		PlayLoopSound3D "T_SndObj_ChainMechanism"
	endif
elseif ( sound )
	set sound to 0
	StopSound "T_SndObj_ChainMechanism"
endif

set timer to ( timer + GetSecondsPassed )
; rotate up
if ( timer < 1 )
	Rotate x 2
	return
	; rotate down
elseif ( timer < 3 )
	Rotate x -2
	return
	; up again
elseif ( timer < 4 )
	Rotate x 2
	return
endif

set timer to 0
SetAtStart

end