#define LED 53
void setup()
{
    pinMode(LED, OUTPUT);
}

void loop()
{
    digitalWrite(LED, HIGH);
    delay(500);
    digitalWrite(LED, LOW);
    delay(500);
}

#define LED 53

void setup()
{
    pinMode(LED, OUTPUT);
}

void loop()
{
    digitalWrite(LED, HIGH);
    delay(500);
    digitalWrite(LED, LOW);
    delay(500);
}

Add blank line for tuto sample.
Add blank line for tuto sample.

