Contribute correction: Bouncing Block

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