void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(14, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(18, INPUT);
}

void loop() {
  int sw = digitalRead(18);
  Serial.println(sw);
if(sw == 1)
{  
  digitalWrite(14, HIGH);
  Serial.println("STOP");
  delay(2000);
  digitalWrite(14, LOW);
  digitalWrite(27, HIGH);
  Serial.println("ALART");
  delay(2000);
  digitalWrite(27, LOW);
  digitalWrite(25, HIGH);
  Serial.println("GO");
  delay(2000);
  digitalWrite(25, LOW);
  digitalWrite(27, HIGH);
  Serial.println("ALART");
  delay(2000);
  digitalWrite(27, LOW);
}
else
{
  digitalWrite(14, LOW);
  digitalWrite(27, LOW);
  digitalWrite(25, LOW);
  digitalWrite(27, LOW);
}
}