I need help with this gui countdown? (tried almost every tutorial on youtube and the roblox discord)

I tried making a countdown timer

local Var1 = 600
for x = 1, Var1 do
    script.Parent.Text = Var1-x
    wait(1)
end

people tried to help me on Roblox discord but they were no help so here is the code I have currently im making an event system where it loads in the map and if people click the join button theyll go to the map im using a regular script in a text thing the text thing is called Text the parent of the text is Event

please someone help me i dont wanna repeat a line of code 600 times

I have a timer as well and I feel that what you're doing is slightly wrong. Rather than doing

local Var1 = 600
for x = 1, Var1 do
    script.Parent.Text = Var1-x
    wait(1)
end

you should do

local Var1 = 600
script.Parent.Text = Var1
for x = 1, Var1 do
    Var1 = Var1 - 1
script.Parent.Text = Var1
    wait(1)
end

So what this does is it will subtract one from the text and rather than doing do you did just do it like that.

so now it will be 600 and subtract one from it.

or you can do

local Var1 = 600
script.Parent.Text = Var1
for x = 1, Var1 do
    script.Parent.Text = script.Parent.Text - 1
    wait(1)
end

They both work the first one is more for you though.

local num = 600

for i = 1,600 do
script.Parent.Text = num
	wait(1)
	num = num -1 
	print(num)
	end