How to create a drowning system when the player is underwater for too long?

[Johnny_Vicc_007]

I wanted to create a drowning duration system where the player would drown if underwater for too long. Is it possible to achieve this using properties of the 3D floor texture of the water, or would it require an ACS script? If an ACS script is necessary, could you recommend a ready-made script that could work with the water texture? Just to clarify, I want the drowning duration to be 30 seconds, and when this time is up, the player will lose 5 health points in shallow waters and 10 health points in deeper waters.