Sometimes it's a matter of luck

I was away for the weekend and awoke to find a rainbow beam of light formed on a wall as the sun passed through some cut glass near the window. The colors were intense, but the background was white. Later, in Photoshop, I changed the wall to black to increase the intensity of contrast with the colors. The photo was taken with my Fuji X-T2 and 16-55mm f/2.8 zoom.

The colors did not last very long so I had to work fast. I have tried creating a shot like this in the studio but never arrived at anything I liked because the colors were never intense enough.  On this day, I just lucked out. Mother nature just created the scene for me.