JeffCoalfax:
Do I have to use const int ledPin = 13 to define the pin OR is there a way to define using pins 2, 3, ,4, and 5 as constants? I am using the code from the Arduino playground, Blink Without Delay which starts with the constant using pin 13.
13 is convenient because most Arduino's already give you an LED connected to pin 13 through a series resistor, meaning you can upload the code to the board without adding any hardware. You're welcome to use whichever pin you like; you aren't tethered to pin 13.
Is there a way to string multiple pins in the blink without delay code?
Depends on what you mean by "string multiple pins together" ?
Do you mean one after another? All at the same time? Binary counter? Random? The answer is yes to all, but the implementation is different.