As ephemeral as a rainbow

There was a light rain with the sun setting behind me and slightly to my left as I drove home. When I looked east toward the side road I was eventually turning into I was thrilled to catch sight of a brilliant band of colors in the sky ahead of me. Then, after quickly taking my eyes off the road a few times to follow its arc, I saw that the rainbow was complete! I even got a better view when I was able to slow down slightly after turning into the less busy road that lead home. So when I got home about five minutes later, I rushed inside the house to grab my camera. But by the time I got back outside, the sun had sunk a little lower into the horizon causing the rainbow to become too faint to be satisfactorily captured on film. Sigh.