Contribute cover: A Slide Show of Eschers

  _____    _    _               ______  
 / ____|| | || | ||     ___    /_   _// 
/ //---`' | || | ||    /   ||   -| ||-  
\ \\___   | \\_/ ||   | [] ||   _| ||_  
 \_____||  \____//     \__ ||  /_____// 
  `----`    `---`       -|_||  `-----`  
                         `-`