Line Tracker 4WD Car Arduino

#define int1 9
#define int2 10
#define int3 11
#define int4 12
#define enA 8
#define enB 7
#define line A0
#define led 5



void setup(){
  pinMode(int1, OUTPUT);
  pinMode(int2, OUTPUT);
  pinMode(int3, OUTPUT);
  pinMode(int4, OUTPUT);
  pinMode(enA, OUTPUT);
  pinMode(enB, OUTPUT);
  pinMode(line, INPUT);
  pinMode(led, OUTPUT);
  digitalWrite(led, HIGH);
}
void loop(){
  int lineSensor = analogRead(line);
  if(lineSensor < 500){
    stop();
  }
  else{
   
    forward();
  }
}
void forward(){
  digitalWrite(int1, HIGH);
  digitalWrite(int2, LOW);
  digitalWrite(int3, HIGH);
  digitalWrite(int4, LOW);
  digitalWrite(enA, HIGH);
  digitalWrite(enB ,HIGH);


}
void stop(){
  digitalWrite(int1, LOW);
  digitalWrite(int2, LOW);
  digitalWrite(int3, LOW);
  digitalWrite(int4, LOW);
  digitalWrite(enA, LOW);
  digitalWrite(enB ,LOW);
  

}