startup.lua

print("Starting AutoFarmer")

local cable = peripheral.wrap("top")

while true do
    if turtle.getItemCount() == 0 then
        local item = cable.findItem("minecraft:dye@15")
        if item then
            item.export("down")
        else
            item = cable.findItem("minecraft:bone")
            if item then
                item.export("down", 21)
                turtle.craft()
            else
                item = cable.findItem("minecraft:bone_block")
                if item then
                    item.export("down", 7)
                    turtle.craft()
                end
            end
        end
    end
    turtle.place()
end