Don't stare at this one for too long

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Author:

Andrew Kepert

Last Updated:

10 years ago

License:

Creative Commons CC BY 4.0

Abstract:

Submitted as an answer to the Showcase of Optical Illusions question on TeX SX.

Click the Illusions tag below to see more!

Tags:

\begin{now}

Discover why 18 million people worldwide trust Overleaf with their work.

% Source: http://tex.stackexchange.com/a/129306/23931
\documentclass{standalone}
\usepackage{tikz}
\begin{document}

\begin{tikzpicture}
  \fill[color=black!40!white] (-6,-6) rectangle (6,6);
  \foreach \n/\r/\twist in {70/5/12,56/4/-12,42/3/12,28/2/-12}{
    \foreach \m in {1,3,...,\n}
      \draw [thick,color=white,shift={(360/\n*\m:\r)},rotate=\twist+360/\n*\m]
        (-.15,-.15) rectangle (.15,.15);
    \foreach \m in {2,4,...,\n}
      \draw [thick,color=black,shift={(360/\n*\m:\r)},rotate=\twist+360/\n*\m]
        (-.15,-.15) rectangle (.15,.15);
    }
\end{tikzpicture}

\end{document}

Don't stare at this one for too long

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