#include <Servo.h>

Servo myservo;

int potpin = 0;
int val;
int lockInPositions[5] = {35, 70, 105, 140, 175}; // Five lock-in positions
int hysteresis = 3; // Hysteresis range in degrees
int maxServoPosition = 180;
int springZone = 5;
int springPosition = maxServoPosition - springZone;

void setup() {
  myservo.attach(9);
}

void loop() {
  val = analogRead(potpin);
  val = map(val, 0, 1023, 0, springPosition);

  for (int i = 0; i < 5; i++) {
    if (abs(val - lockInPositions[i]) < hysteresis) {
      val = lockInPositions[i]; // Lock servo in position
      break;
    }
  }

  // Spring effect in the last 5 degrees
  if (val >= springPosition) {
    val = map(val, springPosition, maxServoPosition, springPosition, maxServoPosition);
  }

  myservo.write(val);
  delay(15);
}