How would i limit bomb dropping in this script?

alrighty mctighty so in im trying to get this script to fire the event based off of the SD value like if it is set to 2 they can drop 2 "bombs in within a 5 second timeframe and after that timeframe is up they can place another 2 in that 5 second timeframe.... ok i cant really explain this off the top of my head but like in Bomberman when you pick up a "bombup" you can drop 1 more bomb than you could have before but you have to wait until the first one that you dropped has exploded and the way i have my bombs set up is the event triggers and creates the bomb and beeps 3 times then explodes which all happens in exactly 5 seconds.. if you can understand what im trying to say here then props to you

the game im working on is here https://www.roblox.com/games/2706427178/Pre-Alpha-God-Of-Bombs if you want to mess around with how i already got things set up

localscript:

local UIS = game:GetService("UserInputService")
local FocusedTextBox = UIS:GetFocusedTextBox()
local player = game.Players.LocalPlayer
local character = player.CharacterAdded:wait()
local humanoid = character:WaitForChild("Humanoid")
local RootPart = character.HumanoidRootPart
local Spot = RootPart.Position
local BombDropped = false
local SD = player.SnoopDogg
UIS.InputBegan:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.Keyboard or input.UserInputType == Enum.UserInputType.Gamepad1 then
		if input.KeyCode == Enum.KeyCode.F or input.KeyCode == Enum.KeyCode.ButtonX then
			if UIS:GetFocusedTextBox() == nil then
				if not BombDropped then
					BombDropped = true
--					for i=SD.Value, 10, 0.5 do   -- use for gamemodes	
--					    print(i)
--				for i = 1, SD.value, 0.5 do
					game.ReplicatedStorage.DropBomb:FireServer(Spot,RootPart)
					wait(5)
--					end
					BombDropped = false
				end
			end
		end
	end
end)