How to make seconds loop in a timer function

I am building a timer but I need the seconds to repeat after it reaches 60 seconds. I thought an IF function would work but not sure,

I have the Global Canvas Set-up

I have the button set-up for starting the timer

This is my formula the seconds on the screen
DATETIME_DIFFERENCE(appVars.timeNow, appVars.timeStarted, “seconds”)

Hi, you could use an IF to check if the DATETIME_DIFFERENCE in seconds between timeStarted and NOW() is 60 or more.