mineclient

MaxTorchDistance = 14
PlaceTorches = true

function getIndexOf(item)
    for i = 1, 16 do
        local current = turtle.getItemDetail(i, false)
        if current ~= nil then
            if current["name"] == item then
                return i
            end
        end
    end

    return -1
end

function move(distance)
    local moved = 0

    -- Move out to desired position
    while moved < distance do
        local indexOfTorches = getIndexOf("minecraft:torch")
        if indexOfTorches == -1 then
            PlaceTorches = false
        end

        turtle.dig()
        turtle.forward()
        turtle.digUp()
        turtle.digDown()

        if PlaceTorches then
            if moved % MaxTorchDistance == 0 then
                turtle.placeDown()
            end
        end

        moved = moved + 1
    end

    -- Turn back around
    turtle.turnLeft()
    turtle.turnLeft()

    -- Return to starting position
    while distance > 0 do
        turtle.forward()
        distance = distance - 1
    end

    -- Turn around and move out of the way
    turtle.up()
    turtle.turnLeft()
    turtle.turnLeft()
end

function prepare()
    turtle.down()

    local indexOfTorches = getIndexOf("minecraft:torch")
    if indexOfTorches == -1 then
        print("No torches found!")
        return
    end

    if indexOfTorches ~= 1 then
        turtle.select(indexOfTorches)
        turtle.transferTo(1)
    end
end

function main()
    turtle.refuel()

    local modem = peripheral.find("modem", rednet.open)
    rednet.broadcast("turtle", "turtnettoserver")

    local id, message = rednet.receive("turtnettoclient")
    local distance = tonumber(message)

    prepare()
    move(distance)
end

main()