User Manual

Code
void setup()
{
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop()
{
digitalWrite(LED_BUILTIN, HIGH);
// turn the LED on (HIGH is the voltage
level) delay(1000);
// wait for a second
digitalWrite(LED_BUILTIN, LOW);
// turn the LED off by