How do I create highscore board for a time attack game where you combine multiple varibles?

hi everyone I am making a game where the player with the lowest possible time wins so I want to create a high scoreboard where the lowest time comes at the top of the board but not just that I need to combine multiple variables. since the player's minutes, seconds and milliseconds are all separate global variables.

see and this is how I programed the time it is super simple every tick add 1 to milliseconds then when it reaches 99 add 1 to seconds and 60 seconds add 1 to minutes

So I followed the instructions on how to create a scoreboard from a your tube video so this is what I have at the moment but of course, this only uses one global variable I set it to Your_time_minutes which is a global variable for how many minutes the player took.

I am sorry I didn't make that clear at but your comment was useful I didn't know about delta time (my fault for not finished my C2 course before I started work on my game)