byte sw=2;
byte led=13;
byte led1=12;
byte led2=11;
byte led3=10;
byte led4=9;
bool ledstate=LOW;
void setup() {
 Serial.begin(115200);
  pinMode(sw, INPUT);
  pinMode(led, OUTPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
}

void loop() {
  bool val=digitalRead(sw);
  Serial.println(val);
  if (val==0){
  ledstate=not(ledstate);
  digitalWrite(led,ledstate);
  delay(300);
  digitalWrite(led,LOW);
 delay(300);
 digitalWrite(led1,ledstate);
 delay(300);
  digitalWrite(led1, LOW);
 delay(300);
  digitalWrite(led2,ledstate);
  delay(300);
  digitalWrite(led2,LOW);
  delay(300);
  digitalWrite(led3,ledstate);
  delay(300);
 digitalWrite(led3,LOW);
 delay(300);
 digitalWrite(led4,ledstate);
  delay(300);
 digitalWrite(led4,LOW);
  while ((!digitalRead(sw))==LOW);
}
   while  (!digitalRead(sw))  {
delay(10);  
}
  if (val==1){
  digitalWrite(led4,ledstate);
  delay(300);
 digitalWrite(led4,LOW);
 delay(300);
 digitalWrite(led3,ledstate);
  delay(300);
  digitalWrite(led3, LOW);
  delay(300);
  digitalWrite(led2,ledstate);
  delay(300);
  digitalWrite(led2,LOW);
  delay(300);
  digitalWrite(led1,ledstate);
  delay(300);
  digitalWrite(led1,LOW);
  delay(300);
 digitalWrite(led,ledstate);
  delay(300);
  digitalWrite(led,LOW);
  delay(300);
  while ((digitalRead(sw))==HIGH);
  }      
 delay(10);
}