//********************************
bool afterSchool = false;       //
bool beforeSchool = false;      //
//********************************

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(18, INPUT);
  pinMode(22, OUTPUT);
}

void loop() {
  if (digitalRead(18) == HIGH && beforeSchool && !afterSchool) {
    unlock();
  }
  if (digitalRead(18) == HIGH && afterSchool && !beforeSchool) {
    login();
  }
  if (digitalRead(18) == HIGH && !afterSchool && !beforeSchool) {
    Serial.println("XXX");
    delay(1000);
  }
}

void unlock() {
  digitalWrite(22, HIGH);
  delay(1000);
  digitalWrite(22, LOW);
  Serial.println("unlocked");
}

void login() {
  digitalWrite(22, HIGH);
  delay(1000);
  digitalWrite(22, LOW);
  Serial.println("logged in");
}