const int buttonpin1=2;
const int  led1=A0;

void setup() {
  pinMode(buttonpin1, INPUT_PULLUP);
  pinMode(led1, OUTPUT);// put your setup code here, to run once:

}

void loop() {
  int buttonstat= digitalRead(buttonpin1);
  if(buttonstat==LOW){
    digitalWrite(led1, HIGH);// put your main code here, to run repeatedly:
   delay(1000);
   digitalWrite(led1, LOW);// put your main code here, to run repeatedly:
   delay(1000);
  }

  else
  {

  digitalWrite(led1, LOW);
  }
}
//1  in push button wiring is same node with 1r