const int redPin = 32;
const int yellowPin = 25;
const int greenPin = 14;

void setup() {
  Serial.begin(115200);
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop() {
  digitalWrite(redPin, HIGH);
  delay(1000);
  digitalWrite(redPin, LOW);

  digitalWrite(yellowPin, HIGH);
  delay(1000);
  digitalWrite(yellowPin, LOW);
  
  digitalWrite(greenPin, HIGH);
  delay(1000);
  digitalWrite(greenPin, LOW);
  
  digitalWrite(greenPin, HIGH);
  delay(1000);
  digitalWrite(greenPin, LOW);
  
  digitalWrite(yellowPin, HIGH);
  delay(1000);
  digitalWrite(yellowPin, LOW);
  
  digitalWrite(redPin, HIGH);
  delay(1000);
  digitalWrite(redPin, LOW);

  delay(500); 
}