const int led1=23;
const int led2=22;
const int led3=21;
const int led4=19;
const int led5=18;
const int pinbut=34;
int direction;

void defilerLEDs(int direction){
  if (direction==1){
    digitalWrite(led1, HIGH);
    delay(50);
    digitalWrite(led2,HIGH);
    digitalWrite(led1,LOW);
    delay(50);
    digitalWrite(led3,HIGH);
    digitalWrite(led2,LOW);
    delay(50);
    digitalWrite(led4,HIGH);
    digitalWrite(led3,LOW);
    delay(50);
    digitalWrite(led5,HIGH);
    digitalWrite(led4,LOW);
    delay(50);
    digitalWrite(led5, LOW);
  }
  else if (direction== -1){
    digitalWrite(led5, HIGH);
    delay(50);
    digitalWrite(led4,HIGH);
    digitalWrite(led5,LOW);
    delay(50);
    digitalWrite(led3,HIGH);
    digitalWrite(led4,LOW);
    delay(50);
    digitalWrite(led2,HIGH);
    digitalWrite(led3,LOW);
    delay(50);
    digitalWrite(led1,HIGH);
    digitalWrite(led2,LOW);
    delay(50);
    digitalWrite(led1, LOW);
  }
}

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(pinbut, INPUT);
}

void loop() {
  int s=digitalRead(pinbut);
  if (s==HIGH){
    defilerLEDs(1);
    delay(500);}
  else{
  defilerLEDs(-1);
  delay(500);}
}