In this paragraph: "Finally, add the LED. The long leg or the cathode connects to the red wire and the short leg or the anode connects to the 220 ohm resistor going to ground.", the words anode and cathode must be swapped.
In this paragraph: "Finally, add the LED. The long leg or the cathode connects to the red wire and the short leg or the anode connects to the 220 ohm resistor going to ground.", the words anode and cathode must be swapped.