Sign Script

local monitorConnection = "top"
local textScale = 5
local lines = {"The Scenic", "Route"}
local delay = 2
local useColor = true

--used internally.
monitor = nil
local lColor = 1
local nColor = 1
local x = 1
local y = 1

local function centerText(cString)
  local offset = 1

  if string.len(cString) < x then
    offset = math.floor((x - string.len(cString)) / 2) + 1
  else
    offset = 1
  end
  return offset
end

local function getColor()
  if monitor.isColor() then
    while lColor == nColor do
      nColor = math.random(1,15)
    end

    lColor = nColor
    monitor.setTextColor(nColor)
  end
end

print("Checking for Monitor.")
while monitor == nil do
  monitor = peripheral.wrap(monitorConnection)
  os.sleep(1)
end

print("Monitor Found, Running Program.")

monitor.setTextScale(textScale)
x, y = monitor.getSize()

while true do
  monitor.clear()
  if useColor == true then
    getColor()
  end
  for k,v in ipairs(lines) do
    if k <= y then
      monitor.setCursorPos(centerText(v),k)
      monitor.write(v)
    end
  end
  os.sleep(delay)
end