Rednet DDoS

local port = 65535
local rednetFormat = true

local mod = peripheral.wrap("back")
mod.open(port)

local tCount = 100
local timeout = 0.05

local total = 0
local rTotal = 0
local start = os.clock()

local function der(num)
    while true do
        -- coroutine.yield()
        for i = 1, 65535 do
            coroutine.yield()
            -- term.setCursorPos(1, num)
            -- term.clearLine()
            total = total + 1
            rTotal = rTotal + 1
            if num > tCount - 49 then
                print("Thread: " .. num .. " | Id: " .. i)
            end
            if rednetFormat == true then
                local nMessageID = math.random( 1, 2147483647 )
                local tMessage = {
                     nMessageID = nMessageID,
                        nRecipient = port,
                        message = "TOTAL: " .. rTotal
                    }
                mod.transmit(port, i, tMessage)
            else
                mod.transmit(port, i, "TOTAL: " .. rTotal)
            end
        end
    end
end

local threads = {}
for i = 1, tCount do
    table.insert(threads, coroutine.create(function() der(i) end))
end

local function F1()
while true do
    -- sleep(0.1)
    term.clear()
    term.setCursorPos(1, 1)
    for i,v in pairs(threads) do
        coroutine.resume(v)
    end
    print("\n\n")
    term.setCursorPos(1, 17)
    write("Press 'up' or 'down' to control thread count")
    term.setCursorPos(1, 18)
    -- term.clearLine()
    local cur = os.clock() - start
    write("Maximum Speed: " .. tCount / timeout)
    term.setCursorPos(1, 19)
    -- term.clearLine()
    write("Speed: " .. total / cur .. " per second.")
    if cur > 1 then
        start = os.clock()
        total = 0
    end
    sleep(timeout)
end
end

local function F2()
    while true do
        local event, key = os.pullEvent("key")
        if key == 200 then
            table.insert(threads, coroutine.create(function() der(tCount) end))
            -- total = 0
            -- start = os.clock()
            tCount = tCount + 1
        elseif key == 208 then
            if #threads > 0 then
                threads[#threads] = nil
                -- total = 0
                tCount = tCount - 1
                -- start = os.clock()
            end
        end
    end
end

parallel.waitForAny(F1, F2)