Description:

Use the Arduino to make an LED blink.

Components:

• Red LED

• 220 Ohm resistor 

Code:

/*
* Code found in the Arduino tutorial:
* http://www.arduino.cc/en/Tutorial/Blink
*/

int ledPin = 12; // LED connected to digital pin 12

void setup()
{
pinMode(ledPin, OUTPUT); // sets the digital pin as output
}

void loop()
{
digitalWrite(ledPin, HIGH); // sets the LED on
delay(random(100,1000)); // waits for a random duration
digitalWrite(ledPin, LOW); // sets the LED off
delay(random(100,1000)); // waits for a random duration
}

blinkblink

Having image posting problems, so please find here: link