-=!TRI-COLOR LED MOOD-LIGHT!=-

I like The Arduino a lot so I decided to make a Instructable for a L.E.D. MOOD-LIGHT that goes like this:
Green=on
Yellow=on
red=on
Green=off
Yellow=off
Red=off
And So on.

Step 1: -=Parts=-

You Will Need:
1x Yellow LED
1x Red Led
1x Green Led
?x Jumper Wires
3x Resistors
1x Arduino UNO
1x Solder-less Breadboard
20x Minutes