Servo as a door lock, How can I ignore a button until later in the program?

Projects General Guidance
7

To blink them on and off replace delay(500) with something like this:

starttime = millis();
currenttime = millis();
while (currenttime < starttime + 500) {
  digitalWrite(led1, LOW);
  digitalWrite(led2, HIGH);
  delay(25);
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  currenttime = millis();
}

or if you want them to get brighter and dimmer, so the same thing, except:

...
  analogWrite(led1, 128);
  analogWrite(led1, 255);
  delay(25);
  analogWrite(led1, 255);
  analogWrite(led1, 128);
...