Arduino Line Follower - v.0.0.6 test

#define LEFT 0
#define RIGHT 1

int back_motor_low = 8;
int back_motor_high = 9;
int back_motor_enable = 10;
int front_motor_low = 13;
int front_motor_high = 12;
int front_motor_enable = 11;

int IR_sensor_pin = 2;
int sensor_status = 0;

int timeout = 0;
int toggler = 0;
int car_active = 1;
int on_line_time = 0;
int direction = LEFT;

void front_motor_turn_left()
{
  digitalWrite(front_motor_low, HIGH);
  digitalWrite(front_motor_high, LOW);
  digitalWrite(front_motor_enable, HIGH);
  direction = LEFT;
}

void front_motor_turn_right()
{
  digitalWrite(front_motor_low, LOW);
  digitalWrite(front_motor_high, HIGH);
  digitalWrite(front_motor_enable, HIGH);
  direction = RIGHT;
}

void front_motor_turn_off()
{
  digitalWrite(front_motor_enable, LOW);
}

void back_motor_run()
{
  digitalWrite(back_motor_enable, HIGH);
}

void back_motor_stop()
{
  digitalWrite(back_motor_enable, LOW);
}

int switch_direction()
{
if(direction == RIGHT)
     front_motor_turn_left();
    else
     front_motor_turn_right();
}

void setup() {
  pinMode(IR_sensor_pin, INPUT);
  pinMode(back_motor_low, OUTPUT);
  pinMode(back_motor_high, OUTPUT);
  pinMode(back_motor_enable, OUTPUT);
  pinMode(front_motor_low, OUTPUT);
  pinMode(front_motor_high, OUTPUT);
  pinMode(front_motor_enable, OUTPUT);

  digitalWrite(back_motor_low, HIGH);
  digitalWrite(back_motor_high, LOW);
  digitalWrite(back_motor_enable, LOW);
  digitalWrite(front_motor_low, HIGH);
  digitalWrite(front_motor_high, LOW);
  digitalWrite(front_motor_enable, LOW);
}

void loop() {
  sensor_status = digitalRead(IR_sensor_pin);

  if(toggler == 0)
  {
  toggler = 1;
  if (car_active == 1)
  {
    back_motor_run();
  }
  }
  else
  {
    back_motor_stop();
    toggler = 0;
  }

  if (sensor_status == HIGH)
  {
    switch direction();
    timeout++;
    if(timeout>50)
      switch_direction();
  }
  else
  {
    switch_direction();
    on_line_time++;
    timeout = 0;
    if (on_line_time > 250)
    {
      on_line_time = 0;
      car_active = 1;
    }
  }

  delay(10);

  if (timeout > 300)
  {
    car_active = 0;
    timeout = 0;
  }
}