local function saveWin(x, y, w, h)
	local winCol = {}
	local winRow = {}
	for a = 1, h do
		for b = 1, w do
			winCol[b] = gpu.get((x + b) - 1, (y + a) - 1)
		end
		winRow[a] = table.concat(winCol)
	end
	return winRow
end

local function restoreWin(x, y, wind)
	for a = 1, #wind do
		gpu.set(x, (y + a) - 1, wind[a])
	end
end