A Beginner's Arduino Guide/Projects/Getting the LED to flash

In this chapter, you will learn how to get the LED to flash on an Arduino board. This is one of the simplest projects that you can undertake. // this runs only once on power up void setup() { pinMode(13, OUTPUT); } // the loop function runs continuously until the device is powered down void loop() { digitalWrite(13, HIGH); // turn on LED delay(1000); // wait for a second digitalWrite(13, LOW); // turn off LED delay(1000); // wait for a second } 50%