#define RedLed 32
#define BlueLed 33
#define GreenLed 27
#define YellowLed 4

void setup() {
  // put your setup code here, to run once:
  pinMode(RedLed, OUTPUT);
  pinMode(BlueLed, OUTPUT);
  pinMode(GreenLed, OUTPUT);
  pinMode(YellowLed, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(RedLed, HIGH);
  digitalWrite(BlueLed, LOW);
  digitalWrite(GreenLed, LOW);
  digitalWrite(YellowLed, LOW);
  delay(1000);
  digitalWrite(RedLed, LOW);
  digitalWrite(BlueLed, HIGH);
  digitalWrite(GreenLed, LOW);
  digitalWrite(YellowLed, LOW);
  delay(1000);
  digitalWrite(RedLed, LOW);
  digitalWrite(BlueLed, LOW);
  digitalWrite(GreenLed, HIGH);
  digitalWrite(YellowLed, LOW);
  delay(1000);
  digitalWrite(RedLed, LOW);
  digitalWrite(BlueLed, LOW);
  digitalWrite(GreenLed, LOW);
  digitalWrite(YellowLed, HIGH);
  delay(1000);
}