In my breadboard I used 220 ohm resistors in combination with one LED.
The loop portion of my program will equal my brightness(0) + fadeAmount(5) every 30 milliseconds until it reaches 255 where it will decrease by 5.
In my schematic drawing of my breadboard my Pin11 first goes to my 220 ohm resistor then goes to the positive side of the LED and then out the negative side and into the ground of the arduino.
This GIF shows my circuit's operation and light show in action!