My room is mostly in darkness for the heat and the trees outside cast a good shade, but one little beam of light made an interesting highlight on an everyday object.
It’s just a roll of frosted transparent tape on the holder with the sun shining through the window screen and leaving the shadow pattern on the roll and an the little tail over the sawtooth edge. The rainbow? Refracted light, on the tape perhaps.
I had only my basic lens with me, but if I’d had my closeup lens I could have caught the sharpness of the shadows, which were truly stunning, but when I took a few seconds to stand up and get ready to run downstairs, the rainbows were gone, though the pattern was left, and in a few seconds even that had faded. Capture that moment.