How do I allow an if statement to read the serial monitor

Other Hardware Motors, Mechanics, Power and CNC
8

I changed it like this, but it stays on metal detected forever and doesn't change back to no metal.

if (ledstat == 2) {
      digitalWrite(pin_LED, HIGH);
      Serial.println("Metal detected");
      myServo.write(90);
      delay(3000);
      myServo.write(0);```