Cool. For your next move on your GF, add a buzzer and add code have it send out I love you in morse code. There are a couple of morse code software libraries around these parts somewhere. She will be so impressed. 
Output from 11, 10, 9 should go through resistor before going to bread-
board and LEDs, but green hardly lit up this way so I skipped
the resistor.
IS THIS BAD? I HAVEN"T BURNED DOWN MY HOUSE YET, SO IT MUST
NOT BE TERRIBLE, BUT I DON"T GET WHY I HAD TO DO THIS...
Yes it is bad, you can easily burn out a digital output pin by not having a current limiting resistors. The reason that green gave you a problem is that green leds require around twice the voltage as red leds do. The solution should have been to use a resistor with half the ohm values that the other leds used. Or take two of the original resistors used and wire them in parallel, that gives you half the ohms.
Lefty