How to set the caller's screen flash in vivos9?

One function of vivo is that there will be a gradient light effect surrounded by the full screen at the edge of the screen when incoming calls and text messages are sent. While reminding users to pay attention, it also makes the atmosphere interesting. So how does vivos9 set the screen flash on the caller side?

How to set the caller screen flash 1 in vivos9, open the phone settings, and click the dynamic effect.

2. Click the ambient light effect.

3. Turn on the button behind the incoming call.

Taking vivos9 as an example, this paper is suitable for OriginOS 1.0 system.