//libray
//variabel



void setup() {
  // program pertama kali dijalankan 
  // program berjalan hanya satukali saja 
  pinMode(8, OUTPUT);
  digitalWrite(8, LOW);

}

void loop() {
  // program arduino yang berjalan berulang 
  digitalWrite(8, HIGH);
  delay(1000);
  digitalWrite(8, LOW);
  delay(1000);


}