const byte LED_PIN = 2;         // This is a placeholder since WOKWI does not support an mp3 player
const byte PIR_PIN = 3;
const byte RELAY_PIN = 4;

void setup()
{
  pinMode( LED_PIN, OUTPUT);    // This is a placeholder since WOKWI does not support an mp3 player
  pinMode( PIR_PIN, INPUT);
  pinMode( RELAY_PIN, OUTPUT);
}

enum states { Off, On, Wait};
const unsigned long ON_TIME = 10000;    // 10 seconds
const unsigned long WAIT_TIME = 30000;   // 30 seconds

states currentState = Off;
unsigned long lastStateChange = 0;

void loop()
{
  switch( currentState)
  {
    case On:
      if( millis() - lastStateChange >= ON_TIME)
      {
        mp3( Off);          // Turn off the mp3 player
        relay( Off);        // Turn off the relay
        lastStateChange = millis();
        currentState = Wait;
      }
    break;

    case Wait:
      if( millis() - lastStateChange >= WAIT_TIME)
      {
        currentState = Off;
      }
    break;

    case Off:
    {
      if( digitalRead( PIR_PIN) == HIGH)
      {
        mp3( On);          // Turn off the mp3 player
        relay( On);        // Turn off the relay
        lastStateChange = millis();
        currentState = On;
      }
    break;
    }
  }
}

void mp3( bool state)
{
  // This is a placeholder since WOKWI does not support an mp3 player
  digitalWrite( 2, state);
}

void relay( bool state)
{
  digitalWrite( RELAY_PIN, state);
}