Blink1

/*
Blink:
Blink the built-in LED on the arduino.
*/

//these are comments
//and grey text after the “//” will not be read by the arduino

// put your setup code here, to run once:
void setup() {

//the built-in LED will be used for output (opposed to input)
pinMode(LED_BUILTIN, OUTPUT);
}

// put your main code here, to run repeatedly:
void loop() {

//turn on (high) LED
digitalWrite(LED_BUILTIN, HIGH);

//wait 1000ms (1 second)
delay(1000);

//turn off (low) LED
digitalWrite(LED_BUILTIN, LOW);

//wait 500ms (0.5 seconds)
delay(500);
}