Roblox Script Generated by ScripterAI

"Hey, I need a code for an existing inventory GUI that allows the player to click on different slots in the GUI to select them. Also, I need a code for an "equip" button so that when the player presses it, they can equip what they have selected."

```lua
-- local script under the inventory GUI 
local inventorySlots = script.Parent:WaitForChild("InventorySlots")
local equipButton = script.Parent:WaitForChild("EquipButton")
local player = game.Players.LocalPlayer
local selectedSlot = nil

-- Function to highlight the selected slot
local function selectSlot(slot)
    if selectedSlot then
        selectedSlot.BackgroundColor3 = Color3.new(1, 1, 1) -- Reset the previous selected slot color
    end
    selectedSlot = slot
    selectedSlot.BackgroundColor3 = Color3.new(0, 1, 0) -- Highlight the new selected slot
end

-- Connect each slot's click event
for _, slot in pairs(inventorySlots:GetChildren()) do
    if slot:IsA("TextButton") then -- Assuming the slots are TextButtons
        slot.MouseButton1Click:Connect(function()
            selectSlot(slot)
        end)
    end
end

-- Equip button functionality
equipButton.MouseButton1Click:Connect(function()
    if selectedSlot and player.Backpack:FindFirstChild(selectedSlot.Name) then
        local toolToEquip = player.Backpack:FindFirstChild(selectedSlot.Name)
        if toolToEquip:IsA("Tool") then
            player.Character.Humanoid:EquipTool(toolToEquip)
        end
    end
end)
```
This script assumes your inventory slots are named after the tools/items they represent and are direct children of a Frame named "InventorySlots" within your inventory GUI. The equip button is expected to be a sibling of the "InventorySlots" frame and named "EquipButton". Adjust the script accordingly to fit the actual structure of your GUI.