1. Download this package http://forum.xda-developers.com/atta...1&d=1362453406
2. unTar.Gz it to the root directory of your Raspberry Pi. There's 6 files which go into /etc/init.d. The files are InitGPIO, led0, led1, led2, led3, and led4. These services control GPIOs 0, 1, 4, 14, and 15. See the chart below for more information.
3. Connect LEDs with 100 ohm resistors to the corresponding GPIOs using an old IDE hard disk cable.
Initialize the GPIOs first
service InitGPIO start
service led0 start service led1 start service led2 start service led3 start service led4 start
service led0 stop service led1 stop service led2 stop service led3 stop service led4 stop