Setting up Environment for Arduino and Testing of Blinking LED

I got an Arduino which is a single-board microcontroller and a software suite for programming it.
I will try to make some sensors/switches connected to the internet through the Arduino and control them from an android phone.

At first, I made a development environment for the Arduino. This was really simple way for my PC (Win7 64bit).

1. Connect the Arduino to PC with USB cable.
   (In my environment its device driver was automatically installed)
2. Download zip file of IDE from an official web site.
   http://arduino.cc/
3. Unzip it.
4. Run arduino.exe.
5. Choose your Serial Port in menu [Tools -> Serial Port].
   (You can confirm its number in the Device Manager. In my case, it is "COM4.")

Then I test a simple sketch which blink LED. In Arduino community, code is called "sketch" and it is similar to C/C++. The sketch is below. Insert a LED into Digital 13 socket and upload the sketch . (I didn't use any register with the LED, but it's not good exactly)

// Blinking LED

#define LED 13 // Digital 13 for LED

void setup() {
  pinMode(LED, OUTPUT); // set the pin output
}

void loop() {
  digitalWrite(LED, HIGH); // LED on
  delay(1);
  digitalWrite(LED, LOW);  // LED off
  delay(1000);
}

I confirmed my Arduino works well, so next time I'll try to use some kind of sensor. :)