void setup() {
  pinMode(0, OUTPUT);  // GP0
  pinMode(1, OUTPUT);  // GP1
  pinMode(2, OUTPUT);  // GP2
  pinMode(3, OUTPUT);  // GP3
  pinMode(4, OUTPUT);  // GP4
  pinMode(5, OUTPUT);  // GP5
  pinMode(6, OUTPUT);  // GP6
  pinMode(7, OUTPUT);  // GP7
  pinMode(8, OUTPUT);  // GP8
  pinMode(9, OUTPUT);  // GP9
  pinMode(10, OUTPUT); // GP10
  pinMode(11, OUTPUT); // GP11
}

void loop() {
  digitalWrite(0, HIGH); // Green ON
  digitalWrite(6, HIGH); // Yellow ON
  digitalWrite(9, HIGH); // Red ON
  digitalWrite(3, HIGH); // Red ON
  delay(2000);
  
  digitalWrite(0, LOW); 
  delay(200);
  digitalWrite(1, HIGH); 
  delay(200);
  digitalWrite(1, LOW); 
  delay(200);
  digitalWrite(2, HIGH);  
  delay(2000);
  digitalWrite(2, LOW);
  digitalWrite(0, HIGH); // Green ON

  delay(2000);
  digitalWrite(3, LOW); 
  delay(200);
  digitalWrite(4, HIGH); 
  delay(200);
  digitalWrite(4, LOW); 
  delay(200);
  digitalWrite(5, HIGH);  
  delay(2000);
  digitalWrite(5, LOW);
  digitalWrite(3, HIGH);
  
  delay(2000);
  digitalWrite(9, LOW); 
  delay(200);
  digitalWrite(10, HIGH); 
  delay(200);
  digitalWrite(10, LOW); 
  delay(200);
  digitalWrite(11, HIGH);  
  delay(2000);
  digitalWrite(11, LOW);
  digitalWrite(9, HIGH);

  delay(2000);
  digitalWrite(6, LOW); 
  delay(200);
  digitalWrite(7, HIGH); 
  delay(200);
  digitalWrite(7, LOW); 
  delay(200);
  digitalWrite(8, HIGH);  
  delay(2000);
  digitalWrite(8, LOW);
  digitalWrite(6, HIGH);
  delay(2000);
}