void setup() {
  // put your setup code here, to run once:
  pinMode(1, INPUT);
  pinMode(2, INPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);

}

bool flag_down = false;
bool flag_up = false;

void loop() {
  // put your main code here, to run repeatedly:
if (digitalRead(1)==HIGH && flag_down == false && flag_up == false) {
  digitalWrite(3, HIGH);
  delay(500);
  digitalWrite(4, HIGH);
  delay(500);
  digitalWrite(5, HIGH);
  delay(500);
  digitalWrite(6, HIGH);
  delay(500);
  digitalWrite(7, HIGH);
  delay(500);
  digitalWrite(8, HIGH);
  delay(500);
  digitalWrite(9, HIGH);
  flag_down = true;
}

if (digitalRead(2)==HIGH && flag_down == false && flag_up == false) {
  digitalWrite(9, HIGH);
  delay(500);
  digitalWrite(8, HIGH);
  delay(500);
  digitalWrite(7, HIGH);
  delay(500);
  digitalWrite(6, HIGH);
  delay(500);
  digitalWrite(5, HIGH);
  delay(500);
  digitalWrite(4, HIGH);
  delay(500);
  digitalWrite(3, HIGH);
  flag_up = true;
}

if (digitalRead(1)==HIGH && flag_down == true && flag_up == false) {
  digitalWrite(3, LOW);
  delay(500);
  digitalWrite(4, LOW);
  delay(500);
  digitalWrite(5, LOW);
  delay(500);
  digitalWrite(6, LOW);
  delay(500);
  digitalWrite(7, LOW);
  delay(500);
  digitalWrite(8, LOW);
  delay(500);
  digitalWrite(9, LOW);
  flag_down = false;
}

if (digitalRead(2)==HIGH && flag_down == false && flag_up == true) {
  digitalWrite(9, LOW);
  delay(500);
  digitalWrite(8, LOW);
  delay(500);
  digitalWrite(7, LOW);
  delay(500);
  digitalWrite(6, LOW);
  delay(500);
  digitalWrite(5, LOW);
  delay(500);
  digitalWrite(4, LOW);
  delay(500);
  digitalWrite(3, LOW);
  flag_up = false;

}
}