Maftehot Haor - The Keys of Light - This is the work of the Dutch artist Mr. Beam. Pianists: Yoel Shemesh and Roi Lauterbach. At the heart of this installation is the idea that, in fact, the piano keys are only white and black, but they sound like millions of different colors and shades. Each visitor can touch the keys and see how the sound develops into the light. Each key creates a different glow, and any melody turns into a symphony of light.