Robot Trash

#include<Servo.h>
#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h>

SoftwareSerial mySerial(10, 11);
 
Servo servo;
int const trigPin = 6;
int const echoPin = 5;
void setup()
{
  Serial.begin (9600);
mySerial.begin (9600);
mp3_set_serial (mySerial);
delay(10);
pinMode(trigPin, OUTPUT); 
pinMode(echoPin, INPUT); 
    servo.attach(3);
}
void loop()
{       int duration, distance;
digitalWrite(trigPin, HIGH); 
delay(1);
digitalWrite(trigPin, LOW);
// Measure the pulse input in echo pin
duration = pulseIn(echoPin, HIGH);
// Distance is half the duration devided by 29.1 (from datasheet)
distance = (duration/2) / 29.1;
// if distance less than 0.5 meter and more than 0 (0 or less means over range) 
if (distance <= 20 && distance >= 0) {
  servo.write(50);
    delay(3000);
} else {
  
  servo.write(160);
 void setup () ;
{ 
mp3_set_volume (95);
delay(10);
mp3_play ();
delay(10);
mp3_play (1);
delay(10);
}
}

// Waiting 60 ms won't hurt any one
delay(40);
}