Check out the Arduino here: http://www.arduino.cc.  It’s pretty cool.

A “sketch” is a little program. This sketch turns on and off the LED when you push the button. Simple but still entertaining.

//my first awesome sketch

#define LED 13 // LED pin

#define BUTTON 7 // Button pin

int buttonVal = 0;

int ledVal = 0;

void setup() {

pinMode(LED, OUTPUT); // LED is an ouput

pinMode(BUTTON, INPUT); // button is an input

}

void loop() {

buttonVal = digitalRead(BUTTON); // store button state

ledVal = digitalRead(LED); // store LED state

if (buttonVal == HIGH && ledVal == HIGH) {

digitalWrite(LED, LOW); // turn LED off

delay(500);

}

if (buttonVal == HIGH && ledVal == LOW) {

digitalWrite(LED, HIGH); // turn LED on

delay(500);

}

}