int verde =13;
int amarillo =2;
int rojo = 4;
void setup() {
 pinMode(verde, OUTPUT);
 pinMode(amarillo, OUTPUT);
 pinMode(rojo, OUTPUT);
}

void loop() {
digitalWrite(verde,1);
delay(1000);
digitalWrite(verde,0);
delay(1000);
digitalWrite(amarillo,1);
delay(700);
digitalWrite(amarillo,0);
delay(700);
digitalWrite(rojo,1);
delay(1000);
digitalWrite(rojo,0);
delay(1000);
digitalWrite(amarillo,1);
delay(700);
digitalWrite(amarillo,0);
delay(700);
}