const int ledVermelho = 7;
const int ledAmarelo = 6;
const int ledVerde = 5;
const int botaoPedestre = 2;

void setup() {
  pinMode(ledVermelho, OUTPUT);
  pinMode(ledAmarelo, OUTPUT);
  pinMode(ledVerde, OUTPUT);
  pinMode(botaoPedestre, INPUT_PULLUP);
}

void loop() {
  digitalWrite(ledVerde, LOW);
  digitalWrite(ledAmarelo, HIGH);
  delay(2000);

  digitalWrite(ledAmarelo, LOW);
  digitalWrite(ledVermelho, HIGH);
  delay(2000);

  digitalWrite(ledAmarelo, HIGH);
  delay(1000);

  if (digitalRead(botaoPedestre) == LOW) {
    digitalWrite(ledAmarelo, LOW);
    digitalWrite(ledVermelho, LOW);
    digitalWrite(ledVerde, HIGH);

    delay(10000);

    digitalWrite(ledVerde, LOW);
    delay(1000);
  }
}