Contribute correction: A Slide Show of Eschers

  ____       ___      _____      ___    
 |  _ \\    / _ \\   / ____||   / _ \\  
 | |_| ||  / //\ \\ / //---`'  | / \ || 
 | .  //  |  ___  ||\ \\___    | \_/ || 
 |_|\_\\  |_||  |_|| \_____||   \___//  
 `-` --`  `-`   `-`   `----`    `---`