side = "right"
rednet.open(side)
while true do
    print("Listening for a message...")
    local id, message = rednet.receive()

    -- print info about command and who sent it
    write("Recieved command: ")
    write(message)
    write(" From: ")
    print(id)

    -- quit if they want to quit
    if message == "quit" then
        break
    -- run if they type run
    elseif message == "mine" then
        print("Mining a column!")

        -- do the minging down
        local downCount = 0
        while downCount < 99 do
            if turtle.getFuelLevel() < 10 then
                turtle.refuel()
            end
            turtle.digDown()
            if turtle.down() then
                downCount = downCount + 1
            end
        end

        -- come back to the top
        for i=0,99 do
            turtle.up()
        end

        -- move forward 4 blocks
        local count = 0
        while count ~= 2 do
            if turtle.forward() then
                count = count + 1
            end
        end

    -- invalid command otherwise
    else
        print("Invalid command!")
    end
end