#define LED1 9
#define LED2 10

void setup() 
{
  
  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);

  Serial.begin(9600); 
}

void loop() 
{
digitalWrite(LED1,HIGH);
digitalWrite(LED2,HIGH);
Serial.println("both LED's are on");
delay(2000);
digitalWrite(LED1,LOW);
digitalWrite(LED2,LOW);
Serial.println("both LED's are off");
delay(2000);
}