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.