int i=0;

void setup()
{
  Serial.begin(9600);  
  pinMode(36,INPUT);
  pinMode(4, OUTPUT);     
  Serial.print("start");  
}
 
void loop()
{
  Serial.print(digitalRead(36));  
  if(digitalRead(36)){
    digitalWrite(4,HIGH);       // turn the LED on
    delay(1000);                    // wait for a second
    digitalWrite(4,LOW);        // turn the LED off 
    delay(1000);                    // wait for a second
  }
}