I would consider it a holographic sundial.<p>A fractal is &quot;any of various extremely irregular curves or shapes for which any suitably chosen part is similar in shape to a given larger or smaller part when magnified or reduced to the same size&quot;[0].<p>A hologram is &quot;a three-dimensional image reproduced from a pattern of interference produced by a split coherent beam of radiation&quot;[1].<p>The 3rd dimensional component of the hologram is modulated by the position of the sun instead of the observer.<p>[0] <a href="http:&#x2F;&#x2F;www.merriam-webster.com&#x2F;dictionary&#x2F;fractal" rel="nofollow">http:&#x2F;&#x2F;www.merriam-webster.com&#x2F;dictionary&#x2F;fractal</a><p>[1] <a href="http:&#x2F;&#x2F;www.merriam-webster.com&#x2F;dictionary&#x2F;hologram" rel="nofollow">http:&#x2F;&#x2F;www.merriam-webster.com&#x2F;dictionary&#x2F;hologram</a>