Do you remember the Fizz exercise where you needed to print the string "Fizz" instead of a multiple of certain number as a variable counted up? Well, we get to repeat that challenge with one small modification.

Write an Arduino program that prints integers that count up from 1, except that for every multiple of 3 (3, 6, 9, 12, etc.), an LED attached to pin 5 flashes on for 0.5 seconds.