int i;
boolean state;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(2, OUTPUT);
  pinMode(27, INPUT_PULLUP); // by default input high=3.3v
  // switch press- input low-valid state
  //switch unpress- input high-unvalid
  
}

void loop() {
  state = digitalRead(27);
if(state == LOW)
{

i++;
Serial.println(i);
delay(800);
}
  if (i==1)
  {
    digitalWrite(2, HIGH);
  }
   if(i==2)
   {
    digitalWrite(2, LOW);
    i=0;
   }
  
  }