int red1 = 11;
int red2 = 10;
int red3 = 9;
int red4 = 8;

int yellow1 = 7;
int yellow2 = 6;
int yellow3 = 5;
int yellow4 = 4;

int green1 = 3;
int green2 = 2;
int green3 = 1;
int green4 = 0;

void setup() {
  pinMode(red1, OUTPUT);
  pinMode(red2, OUTPUT);
  pinMode(red3, OUTPUT);
  pinMode(red4, OUTPUT);
  pinMode(yellow1, OUTPUT);
  pinMode(yellow2, OUTPUT);
  pinMode(yellow3, OUTPUT);
  pinMode(yellow4, OUTPUT);
  pinMode(green1, OUTPUT);
  pinMode(green2, OUTPUT);
  pinMode(green3, OUTPUT);
  pinMode(green4, OUTPUT);
}

void loop() {
  // set all lights to red
  digitalWrite(red1, HIGH);
  digitalWrite(red2, HIGH);
  digitalWrite(red3, HIGH);
  digitalWrite(red4, HIGH);
  
  // set green light for side 1 and turn off the red light for side 1
  digitalWrite(green1, HIGH);
  digitalWrite(red1, LOW);
  digitalWrite(red2, HIGH);
  digitalWrite(red3, HIGH);
  digitalWrite(red4, HIGH);
  delay(5000); // wait for 5 seconds
  
  // turn on yellow light for side 1 and turn off green light for side 1
  digitalWrite(yellow1, HIGH);
  digitalWrite(green1, LOW);
  delay(2000); // wait for 2 seconds
  
  // turn on red light for side 1 and turn off yellow light for side 1
  digitalWrite(red1, HIGH);
  digitalWrite(yellow1, LOW);
  delay(1000); // wait for 1 second
  
  // set green light for side 2 and turn off the red light for side 2
  digitalWrite(green2, HIGH);
  digitalWrite(red2, LOW);
  digitalWrite(red1, HIGH);
  digitalWrite(red3, HIGH);
  digitalWrite(red4, HIGH);
  delay(5000); // wait for 5 seconds
  
  // turn on yellow light for side 2 and turn off green light for side 2
  digitalWrite(yellow2, HIGH);
  digitalWrite(green2, LOW);
  delay(2000); // wait for 2 seconds
  
  // turn on red light for side 2 and turn off yellow light for side 2
  digitalWrite(red2, HIGH);
  digitalWrite(yellow2, LOW);
  delay(1000); // wait for 1 second
  
  // set green light for side 3 and turn off the red light for side 3
  digitalWrite(green3, HIGH);
  digitalWrite(red3, LOW);
  digitalWrite(red1, HIGH);
  digitalWrite(red2, HIGH);
  digitalWrite(red4, HIGH);
  delay(5000); // wait for 5 seconds
  
  // turn on yellow light for side 3 and turn off green light for side 3
  digitalWrite(yellow3, HIGH);
  digitalWrite(green3, LOW);
  delay(2000); // wait for 2 seconds
  
  // turn on red light for side 3 and turn off yellow light for side 3
  digitalWrite(red3, HIGH);
  digitalWrite(yellow3, LOW);
  delay(1000); // wait for 1 second
  
  // set green light for side 4 and turn off the red light for side 4
  digitalWrite(green4, HIGH);
  digitalWrite(red4, LOW);
  digitalWrite(red1, HIGH);
  digitalWrite(red2, HIGH);
  digitalWrite(red3, HIGH);
  delay(5000); // wait for 5 seconds
  
  // turn on yellow light for side 4 and turn off green light for side 4
  digitalWrite(yellow4, HIGH);
  digitalWrite(green4, LOW);
  delay(2000); // wait for 2 seconds

  // turn on red light for side 4 and turn off yellow light for side 4
  digitalWrite(red4, HIGH);
  digitalWrite(yellow4, LOW);
  delay(1000); // wait for 1 second
}