motor functions

void Stop(){
  digitalWrite(motor_left[0], LOW);
  digitalWrite(motor_left[1], LOW);
  //---------------------------------
  digitalWrite(motor_right[0], LOW);
  digitalWrite(motor_right[1], LOW);
  delay(25);
}
//---------------------------------
void drive_forward(){
  digitalWrite(motor_left[0], HIGH);
  digitalWrite(motor_left[1], LOW);

  digitalWrite(motor_right[0], HIGH);
  digitalWrite(motor_right[1], LOW);
}
//---------------------------------
void drive_backward(){
  digitalWrite(motor_left[0], LOW);
  digitalWrite(motor_left[1], HIGH);

  digitalWrite(motor_right[0], LOW);
  digitalWrite(motor_right[1], HIGH);
}
//---------------------------------
void turn_left(){
  digitalWrite(motor_left[0], LOW);
  digitalWrite(motor_left[1], HIGH);
  //---------------------------------
  digitalWrite(motor_right[0], HIGH);
  digitalWrite(motor_right[1], LOW);
}
//---------------------------------
void turn_right(){
  digitalWrite(motor_left[0], HIGH);
  digitalWrite(motor_left[1], LOW);
  //---------------------------------
  digitalWrite(motor_right[0], LOW);
  digitalWrite(motor_right[1], HIGH);
}