Courage The Cowardly Dog Easter Egg - Dil Graffiti

On the episode "The revenge of the chicken from outer space", at the first part of the show when the UFO is ripping peoples heads off, look closely at the part when the cop is at the statue of liberty. On the wall you will see two names graffiti written. One is Dil and the other is Lee. Dil is the creator of courage the cowardly dog. I'm not too sure who Lee is but if someone knows please tell me.