8. LED Blink

How do you plan to solve it?

/*Paste your code here*/
#define Led  13

void setup() {
  // put your setup code here, to run once:
  pinMode(Led, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
    digitalWrite(Led, HIGH);
    delay(400);
    digitalWrite(Led, LOW);
    delay(800);

}

Add video of the output (know more)

Add a photo of your hardware showing the output.