//CONSTANTES
const int ledRed = 10;
const int ledYellow = 9;
const int ledGreen = 8;

void setup() {
  // put your setup code here, to run once:
pinMode(ledRed, OUTPUT);
pinMode(ledYellow, OUTPUT);
pinMode(ledGreen, OUTPUT);
digitalWrite(ledRed, LOW);
digitalWrite(ledYellow, LOW);
digitalWrite(ledGreen, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(ledRed, HIGH);
delay(2500);
digitalWrite(ledRed, LOW);
digitalWrite(ledGreen, HIGH);
delay(2000);
digitalWrite(ledGreen, LOW);
digitalWrite(ledYellow, HIGH);
delay(500);
digitalWrite(ledYellow, LOW);
}