int incomingByte = 0; // for incoming serial data

void setup() {
  // put your setup code here, to run once:
  Serial.begin(100); // opens serial port, sets data rate to 300 bps
  pinMode(13, OUTPUT);
}

void loop() {
    // read the incoming byte:
    if(Serial.available()){
    // // say what you got:
    incomingByte = Serial.read();
    Serial.print(char(incomingByte));
    }


}