/*
 Blink
 Turns an LED on for one second, then off for one second, repeatedly.
*/
// LED_PIN refers to ESP32 GPIO 13
int LED_PIN = 13;
// the setup function runs once when you press reset or power the board
void setup() {
 // initialize digital pin LED_PIN as an output.
 pinMode(LED_PIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
 digitalWrite(LED_PIN, HIGH); // turn the LED on (HIGH is the voltage level)
 delay(1000); // wait for a second
 digitalWrite(LED_PIN, LOW); // turn the LED off by making the voltage LOW
 delay(1000); // wait for a second
}