Scrolling textbox function

local function maxRead(nWidth)
  nWidth = nWidth and nWidth-1 or 10

  term.setCursorBlink(true)
  local X_,Y_ = term.getCursorPos() --get original cursor X,Y

  local String = ""

  while true do --main loop
	local event,p1 = os.pullEvent() --pull event

	if event == "char" then --character was pressed
	  String = String..p1
	elseif event == "key" then --key was pressed
	  if p1 == 28 then --return/enter
		break
	  elseif p1 == 14 then --backspace
		String = String:sub(1,#String-1)
	  end
	end

	term.setCursorPos(X_,Y_)
	term.write(string.rep(" ",nWidth+1))
	term.setCursorPos(X_,Y_)
	term.write(String:sub(((#String - nWidth) >= 1 and #String - nWidth) or 1,#String))
  end

  term.setCursorBlink(false)
  term.setCursorPos(X_,Y_+1) --return cursor to original X, original Y + 1

  return String --return the string
end