boolean pushbutton_input ;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(8, OUTPUT);
  pinMode(4, INPUT_PULLUP);
  


}

void loop() {
  // put your main code here, to run repeatedly:
  pushbutton_input=digitalRead(4);
  Serial.println(pushbutton_input);
  //INPUT= 1 - switch unpressed
 // INPUT = 0 - switch pressed
  if(pushbutton_input== LOW)
  {
  digitalWrite(8, HIGH);
  delay(500);
  digitalWrite(8, LOW);
  delay(500);
  }
  else
  {
  digitalWrite(8, LOW);
  }
  //delay(1000);
  
  
  
  
  

}