Recreate Computer State

local TasksBetweenSleeps = 50
local stepsTaken = 0
local isRestoring = fs.exists(".events")
local fileInstance
local function overwrite(original, fake)
    original = function(sFilter)
        if isRestoring then
            if not fileInstance then
                fileInstance = fs.open(".events","r")
            end
            stepsTaken = stepsTaken + 1
            if stepsTaken > TasksBetweenSleeps then
                stepsTaken = 0
                os.queueEvent("isomnia")
                fake("isomnia")
            end
            local fakeEvent = fileInstance.readLine()
            if not fakeEvent or #fakeEvent == 0 then
                isRestoring = false
                fileInstance.close()
                fileInstance = fs.open(".events","a")
                return original(sFilter) --recursive pull
            end
            return textutils.unserialize(fakeEvent)
        else
            if not fileInstance then
                fileInstance = fs.open(".events","w")
            end
            local event = {fake(sFilter)}
            fileInstance.write(textutils.serialize(event))
            fileInstance.write("\n")
            if event and #event==2 and event[1] == "key" and event[2] == 59 then
                fileInstance.close()
                fs.delete(".events")
                print("History deleted!")
            end
            return unpack(event)
        end
    end
end
local pull = os.pullEventRaw
overwrite(os.pullEventRaw,pull)
local rand = math.random
overwrite(math.random,rand)