Room #1 - Escape Hunt - Sound Player Code

#include <DFPlayer_Mini_Mp3.h>
#include "SoftwareSerial.h"
SoftwareSerial mySerial(10, 11);
# define Start_Byte 0x7E
# define Version_Byte 0xFF
# define Command_Length 0x06
# define End_Byte 0xEF
# define Acknowledge 0x00 //Returns info with command 0x41 [0x01: info, 0x00: no info]

# define ACTIVATED LOW

int buttonNext = 2;
int buttonPause = 3;
int buttonPrevious = 4;
boolean isPlaying = false;


int button1Pin = 8;
int button2Pin = 9;
int button1State = 0;
int button2State = 0;

int times = 0;
int times1 = 0;
int state = 0;
void setup () {
  pinMode(13, OUTPUT);
  pinMode(button1Pin, INPUT);
  pinMode(button2Pin, INPUT);
  Serial.begin( 9600 ) ;
  mySerial.begin (9600);
  delay(1000);
  //playFirst();
  //mp3_pause ();
  isPlaying = false;

  mp3_set_serial (mySerial);  //set softwareSerial for DFPlayer-mini mp3 module
  mp3_set_volume (15);


}



void loop () {
  button1State = digitalRead(button1Pin);
  button2State = digitalRead(button2Pin);

  if (button1State == HIGH && times == 0) {
    state = 1;
  }
  else if (button1State == HIGH && times == 1 && button2State == LOW) {
    state = 0;
  }
  else if (button2State == HIGH && times1 == 0 && button1State == HIGH && times == 1) {
    state = 2;
  }

  else if (button2State == HIGH && times1 == 0 && button1State == LOW && times == 1) {
    state = 2;
  }

  else if (button2State == HIGH && times1 == 1 && button1State == HIGH && times == 1) {
    state = 3;
  }

  else if (button2State == HIGH && times1 == 1 && button1State == LOW && times == 1) {
    state = 3;
  }
  else if (button1State == LOW || button2State == LOW) {
    state = 0;
  }

  switch (state) {
    case 0:    // your hand is on the sensor
      Serial.println("\t\t0:\t\t\n");
      digitalWrite(13, 1);
      //delay(1000);
      mp3_stop ();
      break;
    case 1:    // your hand is close to the sensor
      Serial.println("\t\t1:\t\t\n");
      digitalWrite(13, 0);
      mp3_play (1);
      delay (10000);
      mp3_stop ();
      times = 1;
      break;
    case 2:    // your hand is a few inches from the sensor
      Serial.println("\t\t2:\t\t\n");
      digitalWrite(13, 0);
      mp3_play (2);
      delay (10000);
      mp3_stop ();
      times1 = 1;
      delay(1000);
      state = 3;
      break;
    case 3:    // your hand is nowhere near the sensor
      Serial.println("\t\t3:\t\t\n");
      digitalWrite(13, 1);
      delay(1000);
      digitalWrite(13, 0);
      delay(1000);
      digitalWrite(13, 1);
      delay(1000);
      digitalWrite(13, 0);
      delay(1000);
      digitalWrite(13, 1);
      delay(1000);
      digitalWrite(13, 0);
      delay(1000);
      delay(1200000);
      times = 0;
      times1 = 0;
      break;
  }

}
/*
  digitalWrite(13, 0);
  delay(5000);
  mp3_play (3);
  delay (90000);
*/
// name songs to play [   mp3_play (3);   ] == [   ./mp3/0003.mp3   ]