8. LED Blink

How do you plan to solve it?

 
 By writing code.

/*Paste your code here*/
void setup(void){
	pinmode(5,OUTPUT);
	digitalWrite(5,LOW);
}

void loop(){
	digitalWrite(5,HIGH);
	delay(400);
	digitalWrite(5,LOW);
	delay(800);
}

Add video of the output (know more)

Add a photo of your hardware showing the output.