Arduino Safe code

#include <Servo.h>
#include <OneButton.h>

Servo s1;
OneButton button(A0, true);
int pot = A4; //potentiometer
int val; //code variable
int closed =97; //Servo position when closed
int opened = 125; //Servo position when opened

void setup()
{
  pinMode(pot, INPUT);

  Serial.begin(9600); //optional

  button.attachDoubleClick(doubleclick); //Variable to close the box with a double click

  s1.attach(3); //Servo Pin
  s1.write(closed); //Locks the box when it gets power

  delay(1000); //delay to make sure the servo had enough time to move
}

void loop()
{
  button.tick(); //variable to check for the double click button
  int pStatus = analogRead(pot); //variable to check the potentiometer value
  pStatus = map(pStatus, 1, 1024, 1, 4); //mapping the potentiometer from 1 to 4. This means I have a total of 3 different digits which I can enter. This number can be increased as much as you want

  if(pStatus == 1 && val == 0) //when the potentiometer is on position 1 and the value (for the code) is zero 1 is added to the value
  {
    val ++;
  }
  if(pStatus == 3 && val == 1)
  {
    val ++;
  }
  if(pStatus == 1 && val == 2)
  {
    val = 0;
  }
  if(pStatus == 2 && val == 2)
  {
    val++;
  }
  if(pStatus == 1 && val == 3) //safety point. Without this the potentiometer could just be turned from one to the other side a few times and the save would open anyways
  {
    val = 0;
  }
  if(pStatus == 3 && val == 3)
  {
    val++;
  }
  if(pStatus == 1 && val == 4) //when this point is reached  the safe opens
  {
    s1.write(opened);
  }
  else //to ensure the safe stays closed and closes again when double click is performed
  {
    s1.write(closed);
  }
  Serial.println(val); //optional
}

  void doubleclick() //void for the double click
  {
    val = 0; //when the double click is performed the code value is set to 0 again, meaning the safe closes.
  }

  //PROBLEMS / ISSUES
  //With this few code digits the save is still easy to acces trough trying.
  //Because of this and the fact that there is only one "safety point" the save ironicly isn't that safe.