同じ文字を繰り返した文字列を生成したい

function repeat_letter(str: string, n: integer) :: string:
  loop {_n} times:
    add {_str} to {_result::*}

  set {_result} to concat {_result::*} by ""
  return {_result}

function repeat_letter(str: string, n: integer) :: string:
  loop {_n} times:
    add {_str} to {_result::*}

  set {_result} to concat {_result::*} by ""
  return {_result}

set {_} to ""
loop {_n}  times:
    set {_} to "%{_}%%{_str}%
return {_}

set {_} to ""
loop {_n}  times:
    set {_} to "%{_}%%{_str}%
return {_}