           // read the incoming byte:
           input = Serial.read(); //single character
           
-          Serial.print("I received as a char: ");
-          Serial.println(input);
 
           switch(input){
             
             case 'w':
               move_foward();
               break;
-            case 's':
+            case 'r':
               move_reverse();
               break;
-            case 'a':
-              move_left();
-              break;
-            case 'd':
-              move_right();
+            case 'o':
+              move_out();
+              break;
+            case 'i':
+              move_in();
               break;
             case 'x':
               stop_motor();

    digitalWrite(BMOTOR, HIGH);
  
}
void move_right(){
    digitalWrite(DIR_A, HIGH);
    digitalWrite(DIR_B, LOW);


    digitalWrite(AMOTOR, HIGH);
    digitalWrite(BMOTOR, HIGH);
}
void move_out(){
    digitalWrite(DIR_A, LOW);
    digitalWrite(DIR_B, HIGH);

