Introduction: Led + Arduino "running Light" (very Simple, Good for Beginners)

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hello 
so this is my first arduino project. it is very very simple and it is good for beginners
basicly its just leds hooked up in a row to make a running light

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Step 1: Materials

-8 x Led (I used 3V Leds because i didnt have 5v ones)
-Arduino
-Breadboard
-Jumper Wires

Optional:
-Prototyping Shield

Step 2: Buiding It

Wire it up following the schematic below.
sorry for the mistake its pin 5 not 7^^

Step 3: The Code

Heres the very basic code:

boolean t = true;
int i = 12;
void setup()
{
  pinMode(12,OUTPUT);
  pinMode(11,OUTPUT);
  pinMode(10,OUTPUT);
  pinMode(9,OUTPUT);
  pinMode(8,OUTPUT);
  pinMode(7,OUTPUT);
  pinMode(6,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(4,OUTPUT);
}


void loop()
{
  digitalWrite(i,HIGH);
  delay(50);
  digitalWrite(i,LOW);
  if(t == true)
  {
    i = i - 1;
  }
  else
  {
   i = i + 1;
}
if(i < 5)
{
i = 6;
t = false;
}
if(i > 12)
{
i = 11;
t = true;
}


} 

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