byte led = 13;
 byte led1 = 12;
 byte led2 = 11;
 byte led3 = 10;
 byte led4 = 9;
 byte swPin = 8;

void setup() {
 Serial.begin(115200);
 pinMode(swPin, INPUT);
 pinMode(led, OUTPUT);
 pinMode(led1, OUTPUT);
 pinMode(led2, OUTPUT);
 pinMode(led3, OUTPUT);
 pinMode(led4, OUTPUT); 
}

void loop() {
 boolean reading = digitalRead(swPin); 
 if(reading == 0 ){
  digitalWrite(led,HIGH);
   delay(500);
  digitalWrite(led,LOW);
   delay(500);
  digitalWrite(led1,HIGH);
   delay(500);
  digitalWrite(led1,LOW);
   delay(500);
  digitalWrite(led2,HIGH);
   delay(500);
  digitalWrite(led2,LOW);
   delay(500);
  digitalWrite(led3,HIGH);
   delay(500);
  digitalWrite(led3,LOW);
   delay(500);
  digitalWrite(led4,HIGH);
   delay(500);
  digitalWrite(led4,LOW);
   delay(500);
 }
 if(reading == 0 ){
  digitalWrite(led4,HIGH);
   delay(500);
  digitalWrite(led4,LOW);
   delay(500);
  digitalWrite(led3,HIGH);
   delay(500);
  digitalWrite(led3,LOW);
   delay(500);
  digitalWrite(led2,HIGH);
   delay(500);
  digitalWrite(led2,LOW);
   delay(500);
  digitalWrite(led1,HIGH);
   delay(500);
  digitalWrite(led1,LOW);
   delay(500);
  digitalWrite(led,HIGH);
   delay(500);
  digitalWrite(led,LOW);
   delay(500);
 }
}