void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(14, OUTPUT);
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(26, INPUT);
}

void loop() {
  int switchcase = digitalRead(26);
  if (switchcase == 1)
 
  {
     Serial.println("switch ON ");

  Serial.println("RED ");
  digitalWrite(14, HIGH);
  delay(1000);
  digitalWrite(14, LOW);
  
  digitalWrite(13, HIGH);
   Serial.println("yellow ");
  delay(1000);
  digitalWrite(13, LOW);
  
  digitalWrite(12, HIGH);
   Serial.println("green");
  
  delay(1000);
  digitalWrite(12, LOW);
    Serial.println("now start from red ");
    }
    else 
    {
      Serial.println("switch OFF");
      digitalWrite(14, LOW);
      digitalWrite(13, LOW);
      digitalWrite(12, LOW);
    }
  // put your main code here, to run repeatedly:
   // this speeds up the simulation
}