CC counter

local dataFile = "/cookie"
local machineOutput, tankInput = 0
function boot()
    term.clear()
    term.setCursorPos(1,1)
    local data = { }
    -- check file data
    if fs.exists(dataFile) then
        local handle = assert(fs.open(dataFile, "r"), "Couldn't load "..dataFile) -- this file is opened in read mode
        local input = handle.readAll() -- input is now the serialized table
        handle.close()
    -- -- load data
        data = textutils.unserialize(input) -- this will decode our table
        machineOutput = tonumber( data.machineOutput )
        tankInput  = tonumber( data.tankInput  )
    -- -- create data file
    else
        print("Create "..dataFile.." file")
        storeData()
    end
end

function storeData()
    local data = { }
    data.machineOutput  = machineOutput
    data.tankInput = tankInput
    local output = textutils.serialize(data)
    local handle = assert(fs.open(dataFile, "w"), "Couldn't save "..dataFile) -- this will give you an error if something's gone wrong
    handle.write(output) -- this is where the magic happens, we're storing the entire "target" table
    handle.close()
end