#define led1 5 
#define led2 7
void setup()
{
  pinMode(led1 , OUTPUT);
  pinMode(led2 , OUTPUT);
  Serial.begin(9600);
}
void loop()
{
  digitalWrite(led1, HIGH);
  Serial.println("my led1 is on ");
  delay(2000);
  digitalWrite(led1, LOW);
  Serial.println("my led1 is  off ");
  delay(2000);
  digitalWrite(led2, HIGH);
  Serial.println("my led2 is on ");
  delay(4000);
  digitalWrite(led2, LOW);
  Serial.println("my led2 is  off ");
  delay(4000);
}