fizzbuzz.vim

let s:n = 1
let s:q = ''
function! s:fizzbuzz()
  if !len(s:q)
    if s:n % 3 == 0 && s:n % 5 == 0
      let s:q = "fizzbuzz "
	elseif s:n % 3 == 0
      let s:q = "fizz "
    elseif s:n % 5 == 0
      let s:q = "buzz "
    else
      let s:q = s:n." "
    endif
    let s:n += 1
  endif
  let v:char = s:q[0]
  let s:q = s:q[1:]
endfunction
autocmd InsertCharPre <buffer> call s:fizzbuzz()