8. LED Blink

How do you plan to solve it?

R-320 Ohms

connect to digital GPIO pin 7

int pin =7;
int ONTIME = 400;
int OFFTIME = 800;
void setup()
{
	pinMode(pin, OUTPUT);
}

void loop() 
{
	digitalWrite(pin, HIGH);
	delay(ONTIME);
	digitalWrite(pin, LOW);
	delay(OFFTIME);
}