MedkitScript 2 (Quantity System)

local Tool = script.Parent
local number = 0

local player = game.Players.LocalPlayer
local BackpackFrame = player.PlayerGui:WaitForChild("BackpackGui").Frame
local QuantityText = BackpackFrame.QuantityText

Tool:WaitForChild("stacks").Changed:Connect(function(value)
    QuantityText.Text = "Quantity: "..value
end)

QuantityText.Text = "Quantity: "..Tool.stacks.Value

-- Create the Heal function
local function Heal(player)
    -- Check if the player is alive
    if player.Character and player.Character:FindFirstChild("Humanoid") and player.Character.Humanoid.Health > 0 then
        -- Create a selection box on the player
        local selectionBox = Instance.new("SelectionBox")
        selectionBox.Adornee = player.Character
        selectionBox.LineThickness = 0.1
        selectionBox.Parent = player.Character

        -- Wait for a short duration to show the selection box
        wait(3)

        -- Heal the player
        player.Character.Humanoid.Health = player.Character.Humanoid.MaxHealth

        -- Remove the selection box
        selectionBox:Destroy()
        Tool.stacks.Value -= 1
    end
end

-- Handle equipped event
Tool.Equipped:Connect(function(mouse)
    QuantityText.Visible = true
    -- Create a selection box for the local player
    local selectionBox = Instance.new("SelectionBox")
    selectionBox.Adornee = game.Players.LocalPlayer.Character
    selectionBox.LineThickness = 0.1
    selectionBox.Parent = game.Players.LocalPlayer.Character

    -- Wait for a short duration to show the selection box
    wait(1)

    -- Remove the selection box
    selectionBox:Destroy()
end)

Tool.Unequipped:Connect(function()
    QuantityText.Visible = false
end)

-- Handle mouse button click
Tool.Activated:Connect(function()
    -- Check if the player is healing themselves
    local humanoid = game.Players.LocalPlayer.Character:FindFirstChild("Humanoid")
    if humanoid and humanoid.Health >= number then
        Heal(game.Players.LocalPlayer)
        script.Parent.Handle.healed:Play()
    elseif humanoid and humanoid.Health >= humanoid.MaxHealth then
        Heal(game.Players.LocalPlayer)
        script.Parent.Handle.healed:Play()

    end

    while wait() do
        if Tool.stacks.Value == 0 then
            Tool:Destroy()
            QuantityText.Visible = false
            wait(1)
            break
        end
    end
end)