This is what I imagine whenever I spot a rare rainbow spread across the sky.

A horse galloping across the sky. Released from the shelter in the sun. It's blazing speed leaving but a wave of colors. Charging to its destination. Then back to its home. Leaving its trail for all to see. An artist who's canvas is the sky. Let it be shifting the clouds, allowing dew to enhance the land below, or adding a rainbow.

When I dream of this horse, good things always seem to happen to me.
Hope you like it!