#define led1 8
#define led2 4
void setup()
{
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  Serial.begin(9600);
}
void loop()
{
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  Serial.println("my led1 is on");
  Serial.println("my led2 is off");
  delay(1000);
  digitalWrite(led2, HIGH);
  digitalWrite(led1, LOW);
  Serial.println("my led1 is off");
  Serial.println("my led2 is on");
  delay(2600);
}