startup

-- variables

local camera
local modem

for _, name in ipairs(peripheral.getNames()) do

  if (peripheral.getType(name) == "warpdriveLaserCamera") then
    camera = peripheral.wrap(name)
  end

  if (peripheral.getType(name) == "modem") then
    modem = peripheral.wrap(name)
  end
end

assert(not (camera == nil))
assert(not (modem == nil))

-- setup

camera.beamFrequency(1420)
camera.videoChannel(66)

-- callBacks

function callBack()

  type, x_, y_, z_, id, meta, res = camera.getScanResult()

  if res ~= -1 then
    target = textutils.serialize( { x = x_, y = y_, z = z_ } )
    print("Targeting "..target)

    modem.transmit(3, 1, target)
  end

end

-- loop

local loop = true
local interval = 0.1

local timer = os.startTimer(0)

while loop do
  local event, arg1, arg2, arg3, arg4 = os.pullEvent()

  if (event == "timer") then
    callBack()
    os.startTimer(interval)
  end

  if (event == "key") then
    if (arg1  == keys.space) then
      break
    end
  end
end