startup

local mon = peripheral.wrap("bottom")
local rnd = math.random
local tX, tY = mon.getSize()

while true do
  for y = 1,tY do
    for x = 1,tX do
      mon.setCursorPos(x,y)
      mon.setBackgroundColor(2^rnd(1,15))
      mon.write(" ")
    end
  end
  os.sleep(0)
end