//define switch pin
int sw = 32;

//define led pin
int blue = 12;
int yellow = 14;
int red = 27;
int green = 26;

void setup() 
{
  pinMode(sw, INPUT_PULLUP);

  pinMode(12, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(26, OUTPUT);
}

void loop() 
{
  //read switch status
  byte sw_status = digitalRead(sw);

  if(sw_status == LOW)
  {
    rg_blink();
  }
  if(sw_status == HIGH)
  {
    by_blink();
  }
  else
  {
  digitalWrite(12, LOW);
  digitalWrite(14, LOW);
  digitalWrite(27, LOW);
  digitalWrite(26, LOW);
  }

}

//rg_blink refers to Red & Green LED blinking
//While Blue and Yellow are steady
void rg_blink()
{
  digitalWrite(12, HIGH);
  digitalWrite(14, HIGH);
  digitalWrite(27, HIGH);
  delay(1000);
  digitalWrite(27, LOW);
  digitalWrite(26, HIGH);
  delay(1000);
  digitalWrite(26, LOW);
}

//by_blink refers to Blue and Yellow LED blinking
//while Red and Green are steady.
void by_blink()
{
  digitalWrite(27, HIGH);
  digitalWrite(26, HIGH);
  digitalWrite(12, HIGH);
  delay(1000);
  digitalWrite(12, LOW);
  digitalWrite(14, HIGH);
  delay(1000);
  digitalWrite(14, LOW);
}