#define led 13
#define button 2
int reading ;
void setup() {
pinMode(led,OUTPUT);
pinMode(button,INPUT_PULLUP);
digitalWrite(led,LOW);
}
void loop() {
reading = digitalRead(button);
delay(20);
if(reading==0){
digitalWrite(led, HIGH);
delay(2000);
digitalWrite(led,LOW);
delay(2000);
}
}