void setup() {
pinMode(9, OUTPUT);
pinMode(8, INPUT_PULLUP);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(5, OUTPUT);
pinMode(4, OUTPUT);
}
void loop() {
 int s=digitalRead(8);
 if(s<1)
 {
  digitalWrite(9, HIGH);
  delay(1000);
  digitalWrite(9, LOW);
  delay(1000);
  digitalWrite(7, HIGH);
  delay(1000);
  digitalWrite(7, LOW);
  delay(1000);
  digitalWrite(6, HIGH);
  delay(1000);
  digitalWrite(6, LOW);
  delay(1000);
  digitalWrite(5, HIGH);
  delay (1000);
  digitalWrite(5, LOW);
  delay (1000);
  digitalWrite(4, HIGH);
  delay (1000);
  digitalWrite(4, LOW);
  delay (1000);

 }
}