#define led1Pin 10
#define switch1Pin 13
#define delayT1 500

int val = 0; //variable for reading the pin status
 
void setup() {
  pinMode(led1Pin,OUTPUT); //declare LED as output
  pinMode(switch1Pin,INPUT); //declare pushbutton as input
}

void loop() {
  val=digitalRead(switch1Pin);
 
  //val==HIGH){//check if the input is HIGH(button released)->turn LED OFF
  if(val==LOW){

    digitalWrite(led1Pin,HIGH); //turn LED ON
    delay(delayT1);
    digitalWrite(led1Pin,LOW); //turn LED OFF 
    delay(delayT1);
  }
  
}