void setup() {
  Serial.begin(115200);
  pinMode(27,OUTPUT);
  pinMode(5,OUTPUT);
}

void loop() {
  digitalWrite(27,HIGH);
  Serial.println("BLUE light is glowing."); 
  Serial.println("YELLOW light is not glowing.");  
  digitalWrite(5,LOW);
  delay(5000);
  Serial.println("-----AFTER-5 SECONDS------");
  digitalWrite(5,HIGH);
  Serial.println("YELLOW light is glowing.");
  Serial.println("BLUE light is not glowing.");  
  digitalWrite(27,LOW);
  delay(5000);
  Serial.println("-----AFTER-5 SECONDS------"); 
}