modemSide = "top"

coordsPos = {400, 5}

local function checkPeripheral(side, peripheralType)
	if peripheral.getType(side) ~= peripheralType then
		error(peripheralType .. " not found, please check the config at the beginning of the file")
	end
end

local function showPos()
	canvas.clear()
	local coordsGroup = canvas.addGroup(coordsPos)
	local rect = coordsGroup.addRectangle(0, 0, 100, 10, 0x44444488)
	local text = coordsGroup.addText({0, 0}, "lol")
	while true do
		local event, timer = os.pullEvent("timer")
		if timer == coordsTimer then
			local x, y, z = gps.locate(1)
			text.setText(x)
			coordsTimer = os.startTimer(1)
		end
	end
end

local function keyPressHandler()
	while true do
		local event, key = os.pullEvent("key")
		if key == keys.q then
			print("Exiting...")
			break
		end
	end
end

-- First we check for the peripherals, then we print the info about the program
checkPeripheral(modemSide, "modem")

rednet.open(modemSide)
interface = peripheral.wrap("back")
canvas = interface.canvas()
coordsTimer = os.startTimer(1)


parallel.waitForAny(keyPressHandler, showPos)