Jumper,

You can use "one LED" only like the one in the link below. This is pretty much two LEDs put together. It is a red-green 3mm LED.

http://futurlec.com/LED/LED3RG.shtml

Quote Originally Posted by sayzer View Post
1,0
0,1
0,0

LEDs on these states won't be possible by one pin.
Instead, use 4017 with one pin.

I have an example here:
http://www.picbasic.co.uk/forum/showthread.php?t=6548&
However, the bad news is that Sayzer is right. You can't get three states "0,0", "0,1", and "1,0" with only one MCU pin.

Robert