#Define led1 4
#define led2 3
#Define led3 2
#Define tiempo 1000
void setup() {
 pinMode(led1, OUTPUT) ;
 pinMode(led2, OUTPUT); // put your setup code here, to run once:
pinMode(Led3, OUTPUT);
digitalWrite(led1, LOW);
digitalWrite(led2, LOW);
digitalWrite(led3, LOW);

}

void loop() {
  digitalWrite(led1, HIGH);
  delay(2 * tiempo) ;
  digitalWrite(led2, HIGH);
  delay(4  * tiempo);
  digitalWrite(led3, HIGH);
  delay(2 * tiempo);
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  delay(2*tiempo);// put your main code here, to run repeatedly:

}