   if (Serial.available()) {
     char command = Serial.read();
     switch (command) {
-      //emergency stom if command == 's' or 'S'
       case 's':
         e_stop = true;
         break;

//        128
//        130
//        131
        //driveClockwise(int motorID, int speed, unsigned char command)
        driveClockwise(128, readValue, 1);
        driveClockwise(130, readValue, 1);
        driveClockwise(131, readValue, 1);


    //update and print position as we move
    currentSteps += dir;
    if (i%500 == 0) printPosition();
    
    //wait for 100 ms
