Creating Libraries from sketches?

Projects Programming
6

I think you forgot a star-of-comment marker:

/*    <======= here ?
  // Left motor pin config
  int speedL = 3; 
  int brkL = 9; 
  int dirL = 12; 
  
  // Right motor pin config
  int speedR = 11; 
  int brkR = 8; 
  int dirR = 13;
*/