text = "Welcome to CasinoName"
os.loadAPI("gcapi")
mons = {peripheral.find("monitor")}

function setCursorPos(x,y)
  for _,mon in pairs(mons) do
    mon.setCursorPos(x,y)
  end
end
function write(text)
  for _,mon in pairs(mons )do
    mon.write(text)
  end
end
function setBackgroundColor(color)
  for _,mon in pairs(mons) do
    mon.setBackgroundColor(color)
  end
end
function clear()
  for _,mon in pairs(mons) do
    mon.clear()
  end
end

max_x, max_y = mons[1].getSize()
c = 25
reverse = false
while true do
  setBackgroundColor(colors.black)
  clear()
  setCursorPos(gcapi.getCenter(max_x, text), gcapi.getCenter(max_y))
  write(text)

  setBackgroundColor(colors.cyan)
  for x=1, max_x do
    for y=1, max_y do
      t = (x^2 + y^2)
      if t > (c^2) or t < (c-50)^2 or x == 1 or y == 1 or x == max_x or y == max_y then
        setCursorPos(x,y)
        write(" ")
      end
    end
  end
  if reverse then
    c = c -2
  end
  c= c + 1
  if c > 50 then
    sleep(3)
    reverse = true
  end
  if c < 22 then
    sleep(1)
    reverse = false
  end
  sleep(0.05)
end