Sign Displayer

local m = peripheral.wrap("bottom")
m.setTextScale(2)
local size = {m.getSize()}
local text = ""

if #text > size[1] then
  text = text .. " "

  while true do
    for i=1, #text do
      m.clear()
      m.setCursorPos(1,2)
      local nextText = ""

      if #text -i < size[1] then
        nextText = text:sub(1,i - #text)
      end

      m.write(text:sub(i,#text) .. nextText)
      sleep(0.2)
    end

    m.clear()
    m.write(text)
    sleep(3)
  end

elseif #text == size[1] then
  m.setCursorPos(1,2)
  m.write(text)

else
  m.setCursorPos(math.floor(size[1] /2 - #text /2 +0.5),2)
  m.write(text)
end