Bubbles with macro

End of November and rainstorms makes indoor projects seem like a good idea.
Spectrum scud
Using a spare CD, a glass container, a flash light, water and some olive oil it is possible to create some rather interesting pictures.
Zenith from nadir
Fill the glass container with a minimum of water, just enough to cover the bottom. Then add a single drop of olive oil. Stir forcefully, using a fork, to break the drop of olive oil into small droplets.
Place the glass container on the CD with the shiny surface pointing upward. Use a flash light from the side to generate all possible colors from the CD.Macro bubbles setupZoom in, set the focus, and shoot. Depending on the aperture used a depth can be achieved in the reflection off the CD.