fungal problem?

Moore likely to be Velvet (hehe, a pun), gradual changes do happen in young goldfish, however rapid changes are something to watch out for.

Was the skin fuzzy or peeling? If fuzzy, it was probably columnaris and that can kill in the matter of hours. If the skin was peely, that is probably a sign of a huge pH crash. Are there any other fish in the tank?

since this is a message board - without a visual, it's pretty hard to deduce anything from your description (as it was when you first posted this).

Goldfish can and do change colours as they mature. But the change in colour could have also been fungal, parasitic, bacterial.

the skin was not fizzy or peeling and the other 2 fish in the tank are fine how can i post a pic?

?? help

you can create an account on photobucket and upload the pics. Then copy and paste the URL here as a link

http://i72.photobucket.com/albums/i200/amanda199028/02-05-06_1548.jpg

does anyone know what was wrong?

First of all, how long did you have the fish? Goldfish do require aquarium salt and no heater for the tank. With the picture provided, the goldfish seem to have had a serious disease, but I do not know the name, but I can see that thats one dead fish.