void setup() {
  // put your setup code here, to run once:
pinMode(7, INPUT);
pinMode(4, OUTPUT);
pinMode(3, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int a=digitalRead(7);
if(a==1)
{
  digitalWrite(4,HIGH);
  delay(1000);
  digitalWrite(4,LOW);
delay(1000);
  


}
else
{
  digitalWrite(4, HIGH);
  delay(250);
  digitalWrite(4,LOW);
  delay(250);
  digitalWrite(3, HIGH);
  delay(50);
  digitalWrite(3, LOW);
delay(50);
}
}