int led1=2;
int led2=3;
void setup() {
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
}

void loop() {
  digitalWrite(2, HIGH);
   delay(1000);
  digitalWrite(2, LOW);
  delay(1000);
  digitalWrite(3, HIGH);
   delay(2000);
  digitalWrite(3, LOW);
  delay(2000);
}