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.
Is there a way to string multiple pins in the blink without delay code? OR is there a different code altogether that needs to be used in order to get all 4 LEDs working together with a millis (rather than a delay)?