No clue.. Not a master with tables.. Anyone know how to fix this?

function OnHover(plr)
    if script.Parent:FindFirstChild("SelectionBox") == nil then
    f = Instance.new("SelectionBox")
    f.Parent = script.Parent
    f.Adornee = script.Parent
    if script.Parent:FindFirstChild("Humanoid") == nil then
    h = Instance.new("Humanoid")
    h.Parent = script.Parent.Parent
    h.MaxHealth = 0
    h.Health = 0
    script.Parent.Parent.Name = script.Parent.Parent.Name .. " [F]"
mouse = plr:GetMouse()
Slot1 = plr.PlayerGui.Inventory.Scrolling.Slot1
Slot2 = plr.PlayerGui.Inventory.Scrolling.Slot2
Slot3 = plr.PlayerGui.Inventory.Scrolling.Slot3
Slot4 = plr.PlayerGui.Inventory.Scrolling.Slot4
Slot5 = plr.PlayerGui.Inventory.Scrolling.Slot5
Slot6 = plr.PlayerGui.Inventory.Scrolling.Slot6
Slot7 = plr.PlayerGui.Inventory.Scrolling.Slot7
Slot8 = plr.PlayerGui.Inventory.Scrolling.Slot8
function Keys(key)
    key:lower()
    if key == "f" then

          -- Having trouble with the code below.
             if Slot1.Item.Value == "Nothing" or "Rock" then
        Slot1.Image = "http://www.roblox.com/asset/?id=167139238"
        Slot1.Item.Value = "Rock"
        elseif Slot1.Item.Value ~= "Nothing" or "Rock" then

        if Slot2.Item.Value == "Nothing" or "Rock" then
        Slot2.Image = "http://www.roblox.com/asset/?id=167139238"
        Slot2.Item.Value = "Rock"

        elseif Slot2.Item.Value ~= "Nothing" or "Rock" then
        if Slot3.Item.Value == "Nothing" then
        Slot3.Image = "http://www.roblox.com/asset/?id=167139238"
        Slot3.Item.Value = "Rock"

        -- It stops here.

    end





                    end
                end
            end
mouse.KeyDown:connect(Keys)
        end
    end
end





script.Parent.ClickDetector.MouseHoverEnter:connect(OnHover)


function OffHover()
if script.Parent:FindFirstChild("SelectionBox") ~= nil then
script.Parent.SelectionBox:remove()
if script.Parent.Parent:FindFirstChild("Humanoid") ~= nil then
script.Parent.Parent.Humanoid:remove()
-- if script.Parent.Parent.Name == "Rock [F]" then
script.Parent.Parent.Name = "Rock"
end
    end
end 



script.Parent.ClickDetector.MouseHoverLeave:connect(OffHover)

Now you see, the problem is, the image goes into the Gui and it goes in to all of them.

Anyone know a fix or maybe a way to add a table and test every slot to make sure it isn't equal to Rock or Nothing.