how to make a get coins Brick Area's?

local db = true
script.Parent.Touched:Connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") ~= nil then
		if db == true then
			db = false 
			script.Parent.Transparency = 1
			local player = game.Players:GetPlayerFromCharacter(hit.Parent)
			player.leaderstats.Coins.Value = player.leaderstats.Coins.Value + 500
			script.Parent.Transparency = 1
			if (humanoid ~= nil) then
				humanoid.Health = 0
				db = true
				script.Parent.Transparency = 0.99
			end
		end
	end
end)

-- How to make a get coins, but if the player death, he can get coins again, but also if the player not die, he's can't get coins again?