#define ORANGE 1
#define YELLOW 5
#define GREEN 9
#define LIME 13
#define RED 28
#define PINK 27
#define PURPLE 16
#define LIGHT 21

void setup() {
  pinMode(ORANGE, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(LIME, OUTPUT);
  pinMode(RED, OUTPUT);
  pinMode(PINK, OUTPUT);
  pinMode(PURPLE, OUTPUT);
  pinMode(LIGHT, OUTPUT);
}

void loop() {

  digitalWrite(LIME, HIGH);
  delay(3000);
  
  digitalWrite(LIME, LOW);
  
  digitalWrite(GREEN, HIGH);
  delay(3000);

  digitalWrite(GREEN, LOW);
  digitalWrite(YELLOW, HIGH);
  delay(3000);

  digitalWrite(YELLOW, LOW);
  digitalWrite(ORANGE, HIGH);
  delay(3000);

  
  digitalWrite(ORANGE, LOW);


   digitalWrite(RED, HIGH);
  delay(3000);

  digitalWrite(RED, LOW);

  digitalWrite(PINK, HIGH);
  delay(3000);

  digitalWrite(PINK, LOW);

  digitalWrite(PURPLE, HIGH);
  delay(3000);
  
  digitalWrite(PURPLE, LOW);

   digitalWrite(LIGHT, HIGH);
  delay(3000);
  
  digitalWrite(LIGHT, LOW);
}