void setup() {
  pinMode(1,OUTPUT);
  pinMode(2,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,INPUT_PULLUP);
}

void loop() {
  int state,i,j;
  state=digitalRead(4);
  if( state==LOW)
  {
    digitalWrite(1,HIGH);
    delay(100);
    digitalWrite(1,LOW);
    delay(100);
    for(i=0;i<2;i++)
    {
      digitalWrite(2,HIGH);
      delay(100);
      digitalWrite(2,LOW);
      delay(100);
    }
    for(int j=0;j<3;j++)
    {
     digitalWrite(3,HIGH);
     delay(100);
     digitalWrite(3,LOW);
     delay(100);
    }
  }
  else              
  {
    digitalWrite(1,LOW);
    delay(100);
    digitalWrite(2,LOW);
    delay(100);
    digitalWrite(3,LOW);
    delay(100);
  }
}