const int led=2;
const int push=7;
void setup() {

pinMode(led, OUTPUT);
pinMode(push, INPUT);
}

void loop() {
  if(digitalRead(push)==HIGH)
  {
    while(1){
      digitalWrite(led,1);
      delay(1000);
      digitalWrite(led,0);
      delay(1000);
      digitalWrite(led,1);
      delay(1000);
      digitalWrite(led,0);
      delay(1000);
    }
  }
  else{
    digitalWrite(led,0);
  }
}