Arduino_code_for_moving_vehicle

#define max_speed 255
#define min_speed 255
#define mx_speed 255
#define mn_speed 255

int Left_p = 6;
int Left_n = 9;
int Right_p = 2;
int Right_n = 5;
int en1 = 10; //right
int en2 = 11; //left
void setup() {
  pinMode(Left_p,OUTPUT);
  pinMode(Left_n,OUTPUT);
  pinMode(Right_p,OUTPUT);
  pinMode(Right_n,OUTPUT);
  pinMode(en1,OUTPUT);
  pinMode(en2,OUTPUT);
  
  pinMode(4,INPUT);
  pinMode(7,INPUT);
  pinMode(8,INPUT);
  pinMode(12,INPUT);
  pinMode(13,INPUT);
}

void loop() {
 bool sens1 = digitalRead(4);
 bool sens2 = digitalRead(7);
 bool sens3 = digitalRead(8);
 bool sens4 = digitalRead(12);
 bool sens5 = digitalRead(13);
  if(sens1 == 0 && sens2 == 0 && sens3 == 1 && sens4 == 0 && sens5 ==0){
    forward();
    
  }
  else if(sens2== 1)
  {
   left();
  }
  else if(sens1==1)
  {
    Hardleft();
  }
  else if(sens4==1)
  {
    right();
  }
  else if(sens5==1)
  {
    Hardright();
  }

}
void forward(){
  analogWrite(en1,255);
  analogWrite(en2,255);
  
  digitalWrite(Left_p,0);
  digitalWrite(Left_n,1);
  digitalWrite(Right_p,1);
  digitalWrite(Right_n,0); 

}
void Hardleft(){
  analogWrite(en1,mx_speed);
  analogWrite(en2,mn_speed);
  
  digitalWrite(Left_p,1);
  digitalWrite(Left_n,0);
  digitalWrite(Right_p,1);
  digitalWrite(Right_n,0);
}
void Hardright(){
   analogWrite(en1,mn_speed);
  analogWrite(en2,mx_speed);
  
  digitalWrite(Left_p,0);
  digitalWrite(Left_n,1);
  digitalWrite(Right_p,0);
  digitalWrite(Right_n,1);
}
void left(){
  analogWrite(en1,max_speed);
  analogWrite(en2,min_speed);
  

  digitalWrite(Left_p,0);
  digitalWrite(Left_n,1);
  digitalWrite(Right_p,1);
  digitalWrite(Right_n,0);
}
void right(){
  analogWrite(en1,min_speed);
  analogWrite(en2,max_speed);
  
  digitalWrite(Left_p,0);
  digitalWrite(Left_n,1);
  digitalWrite(Right_p,1);
  digitalWrite(Right_n,0);
}