# Don't forget! This file needs to be 'required' in its spec file
# See README.md for instructions on how to do this

def fizzbuzz (x)
  if (x%3==0 && x%5==0)
    return "FizzBuzz"
  elsif (x%3==0)
    return "Fizz"
  elsif (x%5==0)
    return "Buzz"
  else  
    return nil 
  end
end