How do I Make a game end after the timer has reached zero?

i am working on a little game where there is a scoreText system and a clock countdown timerText from 60 seconds to zero..my problem is that after the timer reaches zero , it continues counting down into minus numbers....how do i stop the timer from doing this ? thanks.

You could add another condition in the event with the countdown to say timerText > 0, then the timer will only count down when the timerText is greater than 0 and won't go into the negative numbers.

Then create an event that says timerText = 0 | (change layout to Game Over screen, or whatever).