const int BUTTON = 19; 			//Connect button to D1
const int LED=2;				//Connect LED to D2
 
int ledState = LOW;     			//Default state of LED is low
int previousButtonState;    
int presentButtonState;
 
void setup() 
{
pinMode(BUTTON,INPUT); 		//Configure Button as input
pinMode(LED, OUTPUT);          	//Configure LED as output
}
 
void loop() 
{						//Read the button state
 	presentButtonState = digitalRead(BUTTON);
 
 	if(presentButtonState==HIGH)	//If Button state is high
 	{
 digitalWrite(LED, HIGH); 	//Turn ON LED
}
 	else					//If button state is low
 {
  	digitalWrite(LED, LOW); 	//Turn LOW LED
 }
}