I need your help in checking my code.Urgent please.

 void RIGHT()                          /////////////////////////////////////block for turning RIGHT
      {analogWrite(leftF,HIGH);
      delay(260); 
      analogWrite(leftF,LOW);
      }
      
      void LEFT() {                 //////////////block for turning on LEFT
      analogWrite(rightF,HIGH); ///right wheel forward
      delay(220); 
      analogWrite(rightF, LOW);
    }

How fast does a duty cycle of 1/256 move the motor?