ppapを出力するネタスクリプト。https://gist.github.com/je6bmq/f010704a03176aaed8cfad126758e73d　リスペクト。一日遅れたけどVIM君10周年おめでとう！

HappyBirthdayVIM.vimrc

function! HappyBirthdayVIM(ppap)
if(has('reltime'))
    "echon "reltimeありますねえ！"
else
    throw "まずいですよ！"
    return 114514
endif
"echo "a:ppap"
"echo a:ppap

if a:ppap == "PPAP"
    echo "ﾍﾟﾝ↑ﾊﾟｲﾅｯﾎﾟｰ↑ｱｯﾎﾟｰﾍﾟﾝ↓"
    return 0
elseif a:ppap == "PPP"
    echo "ﾎﾟｲﾝﾄ↑ﾂｰﾎﾟｲﾝﾄ↑ﾌﾟﾛﾄｺﾙ↓"
endif

    let l:match_end=matchend(reltimestr(reltime()),'\d\+\.') + 1
    let l:rand=reltimestr(reltime())[l:match_end : ] % (2+1)
    if rand
        echon "P"
        " 4文字以上なら最後尾から数えて3文字を次の再帰に渡す
        if strlen(a:ppap) >= 4
            let localPPAP = a:ppap[-3:]
            call HappyBirthdayVIM(l:localPPAP . "P")
        else
            call HappyBirthdayVIM(a:ppap . "P")
        endif
    else
        echon "A"
        if strlen(a:ppap) >= 4
            let l:localPPTP = a:ppap[-3:]
            call HappyBirthdayVIM(l:localPPTP . "A")
        else
            call HappyBirthdayVIM(a:ppap . "A")
        endif
    endif

endif

endfunction
command! HBVIM call HappyBirthdayVIM("")