How do I make a cool down so you can only click on a gui every 0.5 seconds?

So I'm trying to make it so when you click on a textbutton it adds 1. I made that here:

block = 1
game.ReplicatedStorage.anything.OnServerEvent:Connect(function(player)
	player.leaderstats.Blocks.Value = player.leaderstats.Blocks.Value + block
	wait(1)
end)

But, if you use an autoclicker, you can get hundreds of points in seconds. I was wondering how you could add a cooldown so you only get a point every 0.5 seconds? Thanks.

Use a debounce.

-- LocalScript inside the button
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local remote = ReplicatedStorage:WaitForChild("anything")
local button = script.Parent

local clickable = true -- this will be our debounce
button.MouseButton1Down:Connect(function()
	if clickable then -- if clickable is set to true
		clickable = false
		remote:FireServer()
		
		task.delay(0.5, function() -- this will turn clickable to true again after 0.5 seconds
			clickable = true
		end)
	end
end)

An alternative is the Active property.

-- LocalScript inside the button
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local remote = ReplicatedStorage:WaitForChild("anything")
local button = script.Parent

button.MouseButton1Down:Connect(function()
	button.Active = false -- deactivates the button, making the button not clickable
	remote:FireServer()
	
	task.delay(0.5, function() -- this will make the button clickable again after 0.5 seconds
		button.Active = true
	end)
end)