sign

os.loadAPI("GIF")
os.loadAPI("blittle")

args = {...}

local fileName, backgroundCol = args[1], colors.white
local delay = 5
local imgNum = 1

local mon = peripheral.wrap("back")
mon.setTextScale(0.5)
mon.setCursorPos(1, 1)
mon.setBackgroundColour(backgroundCol)
mon.clear()

local x, y = mon.getSize()

local image = {}
image[1] = blittle.shrink(GIF.toPaintutils(GIF.loadGIF(fileName)), backgroundCol)
image[2] = blittle.shrink(GIF.toPaintutils(GIF.loadGIF(fileName)), backgroundCol)
image[3] = blittle.shrink(GIF.toPaintutils(GIF.loadGIF(fileName)), backgroundCol)

while true do
    imgNum = imgNum + 1
    if imgNum > 1 then
        imgNum = 1
    end

    blittle.draw(image[imgNum], math.floor((x-image[imgNum].width)/2)+1, math.floor((y-image[imgNum].height)/2)+1, mon)
    blittle.draw(image[imgNum], math.floor((x-image[imgNum].width)/2)+1, math.floor((y-image[imgNum].height)/2)+1)

    sleep(delay)
end