concrete.lua

local input = peripheral.find("sc-goodies:gold_barrel_2299")
local output = peripheral.find("sc-goodies:gold_barrel_2300")
local myName = peripheral.find("modem").getNameLocal()
turtle.select(1)

while true do
    for i=1,input.size() do
        print("Slot: " .. i)
        local data = input.getItemDetail(i)
        if data and data.name:match("concrete_powder") then
            input.pushItems(myName, i, 1)
            turtle.placeDown()
            turtle.digDown()
            output.pullItems(myName, 1)
        end
    end
end