os.loadAPI("drawing")
local data = {}
local W,H = term.getSize()

for y = 1,H do
	data[y] = {}
	for x = 1,W do
		local d = {}
		d[1] = 2^math.random(0,15)
		d[2] = 2^math.random(0,15)
		d[3] = " "
		data[y][x] = d
	end
end

drawing.save(data,"data")

local img = drawing.load("data")
drawing.draw(img)