int Switch=26;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(4, OUTPUT);
  //
  pinMode((Switch, INPUT);
}

void loop() {
  //int a=digitalRead(Switch)
  Serial.println(a);
    if(a==1){
    digitalWrite(4, HIGH);
    delay(1000);
    digitalWrite(4, LOW);
    delay(1000);
  }
  else{
    digitalWrite(4, LOW);
  }
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}