Perpetual Motion

Hey Einstein here's a poser: How can a photon traveling at the speed of light (186,000 miles per second) … for almost 14 billion years … and oscillating about 10^15 times a second ... not represent perpetual motion? All this is done with the total photon energy of only about 1/10^42 ergs (an erg is 23.9 billionths of a calorie)? (This analysis is taken from the fact that the Hubble telescope has picked up light from a far distant galaxy ... formed about the time of the big bang.)