How do I check if somethings true after I checked if key is pressed down?

Ok, for example.

UIS = game.GetService("InputService")

UIS.InputBegan:connect(function(input)
    if input.KeyCode == Enum.Keycode.KeypadSeven then
        if arrowgui1 == true then 
            -- This gets skipped and just goes to the script instantly.
            print ("Cannot go left")
        end
    end
end)