How to add timer to murder gamemode?

Hello, how do I add a timer to murder gamemode? Someone told me that you have to change sv_rounds.lua but I cant seem to found where to change it at? Here is the download link -

Please help me. Thank you for reading!

A timer as in a HUD timer displaying how much time is left, or actually adding a timer itself until round ends?

Adding a timer until the round ends

Basically you want to find the round end hook, and make a timer that calls the round end hook when it ends.

When a different win condition is met, you must add timer.Stop with the timername to make sure it doesn’t overlap.

Okay thank you very much Skere_