How do I get resettimer to sync with TextLabel?

Wait, are you just asking for the value of the respawn timer to go to the text label? If so, make a loop, search up how to do that and do something as simple as

local Timer = 20
Loop here
Timer = Timer - 1
script.Parent.Text = Timer
Wait(1)
end

Add an if statement for as long as it isnt equal to 0 repeat. if its equal to 0, Timer = 20 or put it on hold however you want to.

local function toMS(s)
    return ("%i:%.2i"):format(s/60%60,s%60)
end

local minutes = 20
local seconds = minutes * 60
local textlabel = --path to billboard textlabel


while task.wait(1) do
    textlabel.Text = toMS(seconds)
    seconds -= 1
    if seconds = 0 then
        seconds = minutes * 60
        print("Finished!")
        task.wait(5)
    end
end

What the function does is it returns a formatted version, so 20 mins will be 20:00 and 5 mins will be 5:00