I need help with something PLEASE HELP ME!

Im making a texture pack and i cant edit fire or the nether portal. I know there is files for them but I cant find the ones that are the "default" texture of them. If you have a link to them or u have the pictures please can you send them to me. Its saying i have to type more so ill just say some junk. Me and Lava4267 are making two different texture packs and one of them are black and white and one of them all of the stuff is inverted of course not lightning because there is not texture file for that :P.