This will get you a very nice set of flashing LEDs just connect the LEDs (I used a breadboard) and turn it on.
Step 1: Program the Arduino.
Insert the following Code:
You can edit the delays for different speeds.
Step 2: Connect the LEDs
Connect all the LEDs to digital I/0 pins 1-9. You can make them any color you want.
MAKE SURE YOU INCLUDE A 220 Ohm RESISTOR OR YOU MAY BLOW THE CIRCUT!!!!!
Step 3: More!
Try editing the delay(100) for more fun!