function getItemsOfType(itemType)
    local toReturn = 0
    local i = 1
    while i<=16 do
        local itemCount =  turtle.getItemCount(i)
        if (itemCount > 0) then
            if (turtle.getItemDetail(i).name == itemType) then
                toReturn = toReturn+itemCount
            end
        end
        i = i + 1
    end

    return toReturn
end

function dropSpecificItemsOfType(itemType,n)
    local returned = 0
    local i = 1
    while i<=16 do
        if n~=returned then
            local itemCount =  turtle.getItemCount(i)
            if (itemCount > 0) then
                if (turtle.getItemDetail(i).name == itemType) then
                    turtle.select(i)
                    if (n-returned > 64) then --Daca tre mai mult de un stack, drop la tot
                        turtle.drop();
                        returned = returned + 64
                    else
                        turtle.drop(n-returned)
                        returned = n
                    end
                end
            end
            i = i + 1
        else
            break
        end
    end
end

cobbleID = "minecraft:cobblestone"
resinID = "ic2:itemharz"
--ic2:itemharz
totalCobblestone = 0
totalResin = 0
while true do
    local event, p1 = os.pullEvent("turtle_inventory")

    local currentCobblestone = getItemsOfType(cobbleID)
    local currentResin = getItemsOfType(resinID)
    print("Current cobble,resin in inv:"..currentCobblestone.." "..currentResin)
    totalCobblestone = totalCobblestone + currentCobblestone
    totalResin = totalResin + currentResin
    print("Total cobblestone, resin: "..totalCobblestone.." "..totalResin)

    dropSpecificItemsOfType(cobbleID,currentCobblestone)
    dropSpecificItemsOfType(resinID,currentResin)
    if totalResin < totalCobblestone then
        redstone.setOutput("right",true)
    else
        redstone.setOutput("right",false)
        totalCobblestone = 0
        totalResin = 0
    end
end