int led1 =11,led2=10;
void setup() {
  pinMode(led1,OUTPUT);
  pinMode(led2, OUTPUT);
  Serial.begin(9600);
  // put your setup code here, to run once:

}

void loop() {
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  delay(1000);
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  delay(1000);
  // put your main code here, to run repeatedly:

}