Rainbow. I think this phenomenon is called sky fire or fire rainbows? I saw one in the sky over Chicago (April 2013). It lasted about 40 minutes and was truly awe inspiring. It changed color and intensity slowly and at times was only partially visible behind a veil of bright cumulus clouds. I was driving to work at the time so was unable to take pictures.
When I depart from this world I will go to the Rainbow Bridge... There I will meet Rusty and Jesse again and we will play together in the meadow awaiting the arrival of Mickey, sometime in the future, after which, the four of us will play and be together for eternity.