Semantics on the yoga mat

I am doing my "homework" for a short photography class I am taking. We are playing with light. I taped a yellow piece of paper in front of my light source in order to get the yellow glow on the aluminium colored metal piping. This is a little thing I got for italian bf way back when I still worked for aaas and was in london facilitating a press conference about the rapid melting of the antartictic.