IoT Based Android phone accelerometer controlled robot

#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
char auth[] = "Add your blynk authentication key";
char ssid[] = "your wi-fi name";
char pass[] = "your wifi password";
const int ml1 = 1;//pins for controlling the motor drivers
const int ml2 = 2;//pins for controlling the motor drivers
const int mr1 = 4;//pins for controlling the motor drivers
const int mr2 = 5;//pins for controlling the motor drivers
void setup()
{
  pinMode(ml1, OUTPUT);
  pinMode(ml2, OUTPUT);
  pinMode(mr1, OUTPUT);
  pinMode(mr2, OUTPUT);
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
}
void loop()
{
  Blynk.run();
}
BLYNK_WRITE(V1)
{
  int x = param[0].asFloat(); //acceleration force applied to axis x
  int y = param[1].asFloat(); //acceleration force applied to axis y
  int z = param[2].asFloat();//acceleration force applied to axis z
  Serial.print("x axis:");
  Serial.println(x);
  Serial.print("y axis:");
  Serial.println(y);
  Serial.print("z axis:");
  Serial.println(z);
  if (y == 0 && x == 0)//stop
  {
    digitalWrite(ml1, HIGH);
    digitalWrite(ml2, HIGH);
    digitalWrite(mr1, HIGH);
    digitalWrite(mr2, HIGH);
  }
  else if (y < 0)//forward
  {
    digitalWrite(ml1, HIGH);
    digitalWrite(ml2, LOW);
    digitalWrite(mr1, HIGH);
    digitalWrite(mr2, LOW);
  }
  else if (z < 6)//reverse
  {
    digitalWrite(ml1, LOW);
    digitalWrite(ml2, HIGH);
    digitalWrite(mr1, LOW);
    digitalWrite(mr2, HIGH);
  }
  else if (x > 1)//right
  {
    digitalWrite(ml1, HIGH);
    digitalWrite(ml2, LOW);
    digitalWrite(mr1, LOW);
    digitalWrite(mr2, HIGH);
  }
  else if (x < 0)//left
  {
    digitalWrite(ml1, LOW);
    digitalWrite(ml2, HIGH);
    digitalWrite(mr1, HIGH);
    digitalWrite(mr2, LOW);
  }
  else
  {

  }
}