 }
 
 void light_on(){
-  
+  digitalWrite(LED, HIGH);
 }
 
 void light_off(){
-  
+  digitalWrite(LED, LOW);
 }
 
 // play a Note, not an authentic Logo command, just fun to use.


	// Motor setup
	motor.setupRight(rightMotorSpeed, rightMotorDirection);
	motor.setupLeft(leftMotorSpeed, leftMotorDirection);

	Serial.println("Robot powered up. Awaiting Logo commands via serial communication");
}

void loop() {
  
}


/***************************************************************/
/**      Commands from Logo's TORTIS project,                 **/

/***************************************************************/

// forward, aka FD
void FD(int amt){
  motor.left(moveSpeed);
  motor.right(moveSpeed);
  delay(amt);
  motor.left(0);
  motor.right(0);
}

// backward, aka BD
void BD(int amt){
  motor.left(-moveSpeed);
  motor.right(-moveSpeed);
  delay(amt);
  motor.left(0);
  motor.right(0);
}

// turn left, aka LT
void LT(int amt){
  motor.left(-moveSpeed);
  motor.right(moveSpeed);
  delay(amt);
  motor.left(0);
  motor.right(0);
}

// turn right, aka RT
void RT(int amt){
  motor.left(moveSpeed);
  motor.right(-moveSpeed);
  delay(amt);
  motor.left(0);
  motor.right(0);
}

void toot(){
  NT(NOTE_G3, 400);
  delay(100);
  NT(NOTE_G3, 400);
}

void pen_up(){
