int ledm = 12;
int ledb = 13;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(ledm, OUTPUT);
  pinMode(ledb, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(ledm, HIGH);
  digitalWrite(ledb, LOW);
  delay(1000);
  digitalWrite(ledb, HIGH);
  digitalWrite(ledm, LOW);
  delay(1000);

}