Contribute correction: Introduction to Shapes

  ______   __   __    _  __    _____   
 /_   _//  \ \\/ //  | |/ //  |  ___|| 
   | ||     \ ` //   | ' //   | ||__   
  _| ||      | ||    | . \\   | ||__   
 /__//       |_||    |_|\_\\  |_____|| 
 `--`        `-`'    `-` --`  `-----`