script.Parent.ProximityPrompt.Triggered:Connect(function(player) game.Workspace.Computer.Screen = BrickColor.new("Lime green") script.Parent.ProximityPrompt.Enabled = false print("Computer hacking compleat") end)
Is the Screen inside the Computer model or somewhere else, also If you want to change the brickcolor of a part you would call its BrickColor property not the part itself so it would look more like this
script.Parent.ProximityPrompt.Triggered:Connect(function(player) game.Workspace.Computer.Screen.BrickColor = BrickColor.new("Lime green") script.Parent.ProximityPrompt.Enabled = false print("Computer hacking compleat") end)