Contribute correction: Final Potential

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