Play a sound or effect when a part moves

Goal: make something happen when a part starts moving, stops, or reaches its end, such as a motor sound, a click, or a light switching on.

The three events

In step 3 Movement, open Events under the part's settings. There are three events:

Event	Happens when
On Movement Started	The part starts moving, in either direction.
On Movement Stopped	The part stops, whether through Stop or by reaching a limit.
On Limit Reached	The part reaches a limit and stops by itself.

Steps

1. In the tool, select the part in step 2 Part, then open step 3 Movement.
2. Open Events.
3. In the event you want, press + to add an entry.
4. Drag the object that should react into the object field. For example, an object with an Audio Source component.
5. Choose what it should do from the No Function dropdown. For example, AudioSource > Play ().
6. Save the scene with Ctrl+S.

Examples

You want	Event	Object	Function
A motor hum while moving	On Movement Started	Audio source with the hum	AudioSource > Play ()
…that stops when the part stops	On Movement Stopped	The same audio source	AudioSource > Stop ()
A click at the end	On Limit Reached	Audio source with the click	AudioSource > Play ()
A lamp that lights at the end	On Limit Reached	The lamp object	GameObject > SetActive (bool), ticked

Good to know

• On Limit Reached runs at both ends: when the part is fully open and when it's fully closed.
• One event can have several entries. Press + again to add a sound and a light.