Describir: A track system for self-tracking dollies /

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