Timer help

[VisualTech48]

Hi, I have ran into a problem where i have no clue how to script this.
Here is the overview of the situation

1.A player enters a room and colides with script area ["TheTime"]

2. The timer must be 30 sek
3. After 30 sek the monster comes in [Brakes the door, but with script and ps]

Case2# If the player findes the key early, the monster brakes the door immediately

And if he dies by the monster "Death" That the sequence happens again (So you dont commit suiced and then just chill walk trought the room)

If anyone could help me it whould be great, Ty