How do you plan to solve it? By declaring the pin 8 into LEDpin then add a delaying loop 1000 High and low
/*Paste your code here*/
int LEDpin = 8;
void setup() {
pinMode(LEDpin, OUTPUT);// put your setup code here, to run once:
}
void loop() {
digitalWrite(LEDpin, HIGH);// put your main code here, to run repeatedly:
delay(1000);
digitalWrite(LEDpin, LOW);
delay(1000);
}
Add video of the output (know more)
Add a photo of your hardware showing the output.