How do I make this Brick not kill me when I click on it?

Pcall is a meathod of handling errors in lua I'm not going to in depth but here is a link to a page explaining it Link

Assuming that "PurpleBrick" is the part you want the user to click and that it is parented by workspace. And that "PurpleBrick" has a Click Detector

local partToClick = game.Workspace.PurpleBrick
local damage = true

local player = game.Players.LocalPlayer

partToClick.ClickDetector.MouseClick:Connect(function()
    damage = false
end)

for i = 0, 3, 1 do
    if damage and i == 3 then
        player.Character.Humanoid:TakeDamage(100)
    end
    wait(1)
end

The above code will give the player 3 seconds to click on the button or face demise.

If you wanted to make it so the player has 3 seconds from the first time they click the button to click the button again, then you would use this code

local partToClick = game.Workspace.PurpleBrick
local damage = true

local player = game.Players.LocalPlayer

local firstClick = true

partToClick.ClickDetector.MouseClick:Connect(function()

    if firstClick then
        firstClick = false

        for i = 0, 3, 1 do
            if damage and i == 3 then
                player.Character.Humanoid:TakeDamage(100)
            end
            wait(1)
        end

    else
        damage = false
    end

end)

Feel free to dm me if you have more questions (I might not respond til after school)

Code is tested and working

If this answer helped you please accept it :)

(This is mainly for future people that answer this) I believe what is going on is that the person wants it so that if the player DOESN'T click on the brick they'll take damage, but if they DO click on it they do not take the damage. It's either this or vice versa.