Timer Gui only works when click run but not play

[42Spider_man42 (nubdudub)]

I’m trying to make a screen GUI that counts down from 100, but if I press play or play here it doesn’t work, it freezes at 100 or 99. But if I press run it does work. The script’s parent is workspace and I tried switching from LocalScript to just Script but it still doesn’t work and I don’t know why. here’s the script:

local TextOnScreen = game.StarterGui.ScreenGuiUntilSmushed.SmushText.Text
local goal = 100
local addnumm = 0

while true do 
	wait(1)
	addnumm = addnumm + 1
	TextOnScreen = TextOnScreen -1
	if addnumm == 100 then
		TextOnScreen = 100
	end
end

Also if I reset my character it goes down a bit but then it freezes again

[Kaid3n22 (Kaiden)]

local player = game.Players.LocalPlayer
local TextOnScreen = player.PlayerGui.ScreenGuiUntilSmushed.SmushText
local goal = 100
local addnumm = 0

while true do 
	task.wait(1)
	addnumm += 1
	TextOnScreen.Text -= 1
	if addnumm == goal then
		TextOnScreen.Text = 100
		break
	end
end

You assigned the text to a variable. Also, you are editing StarterGui, so you should use PlayerGui.

local TextOnScreen = game.StarterGui.ScreenGuiUntilSmushed.SmushText
local goal = 100
local addnumm = 0

while true do 
	task.wait(1)
	addnumm += 1
	TextOnScreen.Text -= 1
	if addnumm == goal then
		TextOnScreen.Text = 100
		break
	end
end

[42Spider_man42 (nubdudub)]

do I put this in a local script, and do I keep the script in the workspace?

[Archenhailor]

It seems you’re not changing the UI displayed on the CLIENT’S screen. If you want the timer to work, you should put the code in a LocalScript.

[light_lanterns (light)]

If you are editing a GUI of a Player. You should mention PlayerGui, also if the script is a LocalScript. You should put this script in StarterGui
Also for a shorter way of using a timer, you could use for loops
Other thing is your script is using the string of the Text for a Number, instead make the string the number
ex of your script with the stuff I said

local player = game.Players.LocalPlayer
local TextOnScreen = player.PlayerGui:WaitForChild("ScreenGuiUntilSmushed").SmushText
local goal = 100
local addnumm = 0

for T =  0, goal do
	task.wait(1)
	addnumm += 1
	TextOnScreen.Text = T
	if addnumm == goal then
		TextOnScreen.Text = "100"
		end
end

If you want the opposite, from 100 to 0, just do this

local player = game.Players.LocalPlayer
local TextOnScreen = player.PlayerGui:WaitForChild("ScreenGuiUntilSmushed").SmushText
local goal = 100
local addnumm = 0

for T =  goal, 0, -1 do
	task.wait(1)
	addnumm += 1
	TextOnScreen.Text = T
	if addnumm == goal then
		TextOnScreen.Text = "0"
		end
end

[Kaid3n22 (Kaiden)]

No, this would go into StarterGui. Also, @light_lanterns’s solution may be much better, but his also has some problems, so here’s a fixed version of that:

local player = game.Players.LocalPlayer
local TextOnScreen = player.PlayerGui.ScreenGuiUntilSmushed.SmushText
local goal = 100
local addnumm = 0

while true do 
	task.wait(1)
	addnumm += 1
	TextOnScreen.Text = 100 - addnumm
	addnum = addnum < goal and addnum or 0
end

[42Spider_man42 (nubdudub)]

it gives me the error:

attempt to compare nil < number 

thanks for your help btw

[Kaid3n22 (Kaiden)]

Oh, my bad. forgot the extra m.

local player = game.Players.LocalPlayer
local TextOnScreen = player.PlayerGui.ScreenGuiUntilSmushed.SmushText
local goal = 100
local addnumm = 0

while true do 
	task.wait(1)
	addnumm += 1
	TextOnScreen.Text = 100 - addnumm
	addnumm = addnumm < goal and addnumm or 0
end

Edit: forgot another m, so recopy the script if you copied before the edit.

[ddash_dev (ddash)]

Was about to say you forgot another m just when you noticed it lol