flickeringLights

local args = {...}

local order = {#args>0 and tonumber(args[1]) or 1, #args>1 and tonumber(args[2]) or 2}

local mon = {}
for _,dev in pairs(peripheral.getNames()) do
  if peripheral.getType(dev) == "monitor" then
    mon[#mon+1] = peripheral.wrap(dev)
  end
end
--peripheral.find("monitor")

print(#mon)

local l = 1
local col = {colors.lightGray,colors.cyan}

local w,h = mon[order[1]].getSize()

for _,m in pairs(mon) do m.setBackgroundColor(col[2]) m.clear() end

while true do
  mon[order[1]].setBackgroundColor(col[2])
  mon[order[2]].setBackgroundColor(col[2])
  mon[order[1]].clearLine(l)
  mon[order[2]].clearLine(h-l+1)
  mon[order[1]].setBackgroundColor(col[1])
  mon[order[2]].setBackgroundColor(col[1])
  l=1+(l+1)%h
  mon[order[1]].setCursorPos(1,l)
  mon[order[2]].setCursorPos(1,h-l+1)
  for i=1,w do mon[1].write(" ") mon[2].write(" ") end
  sleep(0.1)
end