EMC Generating Turtle

local dustBottom = true

while true do
    for i=1, 11 do
        if i ~= 4 and i ~= 8 then
            if (turtle.getItemCount(i) == 0) then
                turtle.select(i)
                if i == 6 then
                    if dustBottom then
                        turtle.suckUp()
                    else
                        turtle.suckDown()
                    end
                else
                    if dustBottom then
                        turtle.suckDown()
                    else
                        turtle.suckUp()
                    end
                end
            end
        end
    end

    turtle.select(16)
    turtle.craft()
    turtle.drop()
end