   if (Serial.available() > 0) {
     // get incoming byte:
     inByte = Serial.read();
+    if(inByte == onMessage){
+      turnOn();
+    }
+    if(inByte == offMessage){
+      turnOff();
+    }
   }
 }
 

int inByte = 0;         // incoming serial byte

void setup()
{
  // start serial port at 9600 bps:
  Serial.begin(9600);
  while (!Serial) {

    delay(300);
  }
}

void turnOn() {
  digitalWrite(led, HIGH);  
}

void turnOff() {
  digitalWrite(led, LOW);
}
