Schematic representation of a polymer gel whose chains are cross-linked using rotating molecular motors (the red and blue parts of the motor can turn relative to each other when provided with energy). (sciencedaily.com)
I used about 1/2 cup of the Cocowhip for the blue part, but honestly it doesn't have to be exact at all. (feastingonfruit.com)
These photoreceptors directly (rather than indirectly, like the ones in your eyes) convert incoming light in the blue part of the spectrum into an excitatory, positive electrical signal. (scientificamerican.com)