Bright an LED Using Arduino

1void setup() {
2 
3  pinMode(12, OUTPUT);
4}
5
6
7void loop()  {
8  digitalWrite(12, HIGH);   // turn the LED on (HIGH is the voltage level)
9  delay(1000);                       // wait for a second
10  digitalWrite(12,  LOW);    // turn the LED off by making the voltage LOW
11  delay(1000);                       //  wait for a second
12}