ender chest loop

chest=peripheral.wrap("left")
colors={
1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,32768
}
args={ ... }
if args[1]==nil then
    args={1,1,1}
end

function checkContents()
    repeat
        content=0
        for i=1,27 do
            slotContent=chest.getStackInSlot(i)
            if slotContent==nil then
                content=content
            else
                content=content+1
            end
        end
        if content>0 then
            sleep(1)
        end
    until content<=0
    return content
end

function colorCycle()
    colorL,colorM,colorR=chest.getColors()
    for i=0+tonumber(args[1]),16 do
        colorL=colors[i]
        for i=0+tonumber(args[2]),16 do
            colorM=colors[i]
            for i=0+tonumber(args[3]),16 do
                colorR=colors[i]
                chest.setColours(colorL,colorM,colorR)
                checkContents()
            end
        end
    end
end

colorCycle()