diff --git a/disk-driver.lua b/disk-driver.lua
index df763c2..9ed1407 100644
--- a/disk-driver.lua
+++ b/disk-driver.lua
@@ -1,5 +1,5 @@
 local diskDrive = peripheral.find("drive")
-local monitor = require("monitor-driver")
+
 local function getFilePath()
     if diskDrive and diskDrive.isDiskPresent() then
         local path = diskDrive.getMountPath()
@@ -75,9 +75,10 @@ local function writeValue(key, value)
 end
 
 local function initialize()
-    monitor.writeLine("Initializing Data Storage...")
+    local monitor = peripheral.find("monitor")
+    if monitor then monitor.write("Initializing Data Storage...") end
     if diskDrive and diskDrive.isDiskPresent() then
-        monitor.writeLine("Disk detected. Initializing data storage.")
+        if monitor then monitor.write("Disk detected. Initializing data storage.") end
         local path = getFilePath()
         if path and not fs.exists(path) then
             saveData({})
diff --git a/kernel.lua b/kernel.lua
index acdc29f..05d4449 100644
--- a/kernel.lua
+++ b/kernel.lua
@@ -55,6 +55,7 @@ addDriver("task-manager")
 addDriver("monitor-driver")
 addDriver("disk-driver")
 addDriver("speaker-driver")
+addSound("notification")
 
 
 return { addDriver = addDriver, addFolderDriver = addFolderDriver, addProgram = addProgram, addSound = addSound, addServerHandler = addServerHandler }
\ No newline at end of file
diff --git a/programs/roulette.lua b/programs/roulette.lua
new file mode 100644
index 0000000..4ad79a8
--- /dev/null
+++ b/programs/roulette.lua
@@ -0,0 +1,238 @@
+-- Roulette Machine
+-- Listens for a redstone signal on any side, spins a "ball" around the
+-- perimeter of every connected monitor, and lands on a random pocket.
+--
+-- Setup:
+--   * 1 advanced computer
+--   * 1+ monitors (vanilla or Tom's wired together as a single logical monitor)
+--   * Redstone input on any side to start a spin
+
+local mon                 -- the active monitor peripheral
+local W, H                -- monitor character size
+local perimeter           -- ordered list of {x, y, color} cells around the edge
+local ballIndex           -- current position in perimeter
+local lastBallIndex       -- previous position (so we can repaint the pocket)
+
+local SPIN_MIN_TIME       = 6     -- seconds
+local SPIN_MAX_TIME       = 12
+local START_DELAY         = 0.03  -- seconds between ball moves at full speed
+local END_DELAY           = 0.45  -- seconds between ball moves just before stopping
+local BALL_COLOR          = colors.white
+local ZERO_COLOR          = colors.green
+local TEXT_COLOR          = colors.white
+
+----------------------------------------------------------------------
+-- Monitor helpers
+----------------------------------------------------------------------
+
+local function pickMonitor()
+    -- peripheral.find returns the first match; with Tom's Peripherals
+    -- a multi-monitor block exposes itself as a single "monitor".
+    mon = peripheral.find("monitor")
+    if not mon then
+        error("No monitor attached / found on the network")
+    end
+    mon.setTextScale(0.5)
+    W, H = mon.getSize()
+end
+
+local function setPixel(x, y, bg)
+    mon.setBackgroundColor(bg)
+    mon.setCursorPos(x, y)
+    mon.write(" ")
+end
+
+local function setLabel(x, y, bg, fg, ch)
+    mon.setBackgroundColor(bg)
+    mon.setTextColor(fg)
+    mon.setCursorPos(x, y)
+    mon.write(ch)
+end
+
+----------------------------------------------------------------------
+-- Build the wheel perimeter
+----------------------------------------------------------------------
+
+-- Walks the edge clockwise starting at top-left, returning a list of
+-- {x = , y = , color = , label = } pockets. Colors alternate red/black
+-- with a single green "0" pocket at the start.
+local function buildPerimeter()
+    perimeter = {}
+    local function add(x, y)
+        table.insert(perimeter, { x = x, y = y })
+    end
+
+    -- top edge: left -> right
+    for x = 1, W do add(x, 1) end
+    -- right edge: top+1 -> bottom
+    for y = 2, H do add(W, y) end
+    -- bottom edge: right-1 -> left
+    for x = W - 1, 1, -1 do add(x, H) end
+    -- left edge: bottom-1 -> top+1
+    for y = H - 1, 2, -1 do add(1, y) end
+
+    -- Assign colors: 0 = green, then alternating red/black around the wheel.
+    for i, cell in ipairs(perimeter) do
+        if i == 1 then
+            cell.color = ZERO_COLOR
+            cell.label = "0"
+        else
+            cell.color = (i % 2 == 0) and colors.red or colors.black
+            cell.label = tostring(i - 1)
+        end
+    end
+end
+
+----------------------------------------------------------------------
+-- Drawing
+----------------------------------------------------------------------
+
+local function drawWheel()
+    mon.setBackgroundColor(colors.black)
+    mon.clear()
+    for _, cell in ipairs(perimeter) do
+        setPixel(cell.x, cell.y, cell.color)
+    end
+end
+
+local function drawCenter(lines)
+    -- Clear interior
+    mon.setBackgroundColor(colors.black)
+    for y = 2, H - 1 do
+        for x = 2, W - 1 do
+            setPixel(x, y, colors.black)
+        end
+    end
+    mon.setTextColor(TEXT_COLOR)
+    local startY = math.floor(H / 2) - math.floor(#lines / 2)
+    for i, line in ipairs(lines) do
+        local x = math.max(2, math.floor((W - #line) / 2) + 1)
+        mon.setCursorPos(x, startY + i - 1)
+        mon.setBackgroundColor(colors.black)
+        mon.write(line)
+    end
+end
+
+local function repaintPocket(idx)
+    local c = perimeter[idx]
+    setPixel(c.x, c.y, c.color)
+end
+
+local function drawBall(idx)
+    local c = perimeter[idx]
+    setPixel(c.x, c.y, BALL_COLOR)
+end
+
+----------------------------------------------------------------------
+-- Spin logic
+----------------------------------------------------------------------
+
+local function moveBall(newIdx)
+    if lastBallIndex then repaintPocket(lastBallIndex) end
+    drawBall(newIdx)
+    lastBallIndex = newIdx
+    ballIndex = newIdx
+end
+
+-- ease-out cubic from 0..1
+local function easeOut(t)
+    local inv = 1 - t
+    return 1 - inv * inv * inv
+end
+
+local function spin()
+    local n = #perimeter
+    local spinTime = SPIN_MIN_TIME + math.random() * (SPIN_MAX_TIME - SPIN_MIN_TIME)
+    local elapsed = 0
+
+    drawCenter({ "SPINNING..." })
+    -- Make sure the centered text doesn't hide the ball trail; redraw shortly
+    sleep(0.6)
+    drawCenter({ "" })
+
+    -- During the fast portion the ball jumps several pockets per tick to look frantic.
+    while elapsed < spinTime do
+        local t = elapsed / spinTime         -- 0 .. 1
+        local eased = easeOut(t)             -- 0 .. 1, slows over time
+        local delay = START_DELAY + (END_DELAY - START_DELAY) * eased
+        local jump = math.max(1, math.floor((1 - eased) * 4 + 0.5))
+
+        local nextIdx = ((ballIndex - 1 + jump) % n) + 1
+        moveBall(nextIdx)
+        sleep(delay)
+        elapsed = elapsed + delay
+    end
+
+    -- Final settle: a few slow ticks then stop on a uniformly random pocket.
+    local finalIdx = math.random(1, n)
+    -- Walk forward to the final pocket so the stop looks natural.
+    local steps = ((finalIdx - ballIndex) % n)
+    if steps == 0 then steps = n end
+    for i = 1, steps do
+        local nextIdx = ((ballIndex - 1 + 1) % n) + 1
+        moveBall(nextIdx)
+        sleep(END_DELAY + i * 0.04)
+    end
+
+    return perimeter[finalIdx]
+end
+
+local function announce(pocket)
+    local colorName =
+        (pocket.color == colors.red) and "RED" or
+        (pocket.color == colors.green) and "GREEN" or "BLACK"
+    drawCenter({
+        "WINNER",
+        colorName .. " " .. pocket.label,
+    })
+end
+
+----------------------------------------------------------------------
+-- Lifecycle
+----------------------------------------------------------------------
+
+local function start()
+    math.randomseed(os.epoch("utc"))
+    pickMonitor()
+    buildPerimeter()
+    ballIndex = 1
+    lastBallIndex = nil
+    drawWheel()
+    drawBall(ballIndex)
+    drawCenter({ "ROULETTE", "Pull lever to spin" })
+end
+
+local function stop()
+    if mon then
+        mon.setBackgroundColor(colors.black)
+        mon.setTextColor(colors.white)
+        mon.clear()
+        mon.setCursorPos(1, 1)
+    end
+end
+
+local function waitForRedstonePulse()
+    -- Wait for a rising edge on any side.
+    while true do
+        os.pullEvent("redstone")
+        for _, side in ipairs(redstone.getSides()) do
+            if redstone.getInput(side) then
+                return side
+            end
+        end
+    end
+end
+
+local function main()
+    while true do
+        waitForRedstonePulse()
+        local pocket = spin()
+        announce(pocket)
+        -- Small cooldown so a held lever doesn't immediately re-trigger.
+        sleep(3)
+        -- Drain any redstone events during cooldown by redrawing idle screen.
+        drawCenter({ "ROULETTE", "Pull lever to spin" })
+    end
+end
+
+return { start = start, stop = stop, main = main }
diff --git a/speaker-driver.lua b/speaker-driver.lua
index d0c1a71..df72366 100644
--- a/speaker-driver.lua
+++ b/speaker-driver.lua
@@ -1,15 +1,11 @@
 local speaker = peripheral.find("speaker")
 local dfpwm = require("cc.audio.dfpwm")
-local encoder = dfpwm.make_encoder()
-local decoder = dfpwm.make_decoder()
 
 local sounds = {
     {name = "notification", file = "notification.dfpwm"}
 }
 
 local function initialize()
-    kernel = require("kernel")
-    kernel.addSound("notification")
     speaker = peripheral.find("speaker")
     if not speaker then
         print("Warning: No speaker attached.")
@@ -39,7 +35,6 @@ local function play(name)
         return false
     end
 
-    -- Create a new decoder for this playback to reset state
     local decoder = dfpwm.make_decoder()
     
     for chunk in io.lines(filePath, 16 * 1024) do
@@ -50,7 +45,6 @@ local function play(name)
     end
     return true
 end
-----------------
 
 local function getFileName(name)
     local extension = ".dfpwm"
@@ -68,6 +62,7 @@ end
 
 local function playSound(fileName)
     local fileStream = getFileName(fileName)
+    local decoder = dfpwm.make_decoder()
     local values = io.lines(fileStream, 16 * 1024)
     for input in values do
         local decoded = decoder(input)
@@ -77,20 +72,26 @@ local function playSound(fileName)
     end
 end
 
-
-
 local function playTTSFile(value)
     local message = textutils.urlEncode(value)
     local url = "http://api.astrocore.space/api/TextToSpeech?message=" .. message
     local response, err = http.get { url = url, binary = true }
+
+    if not response then
+        print("TTS request failed: " .. (err or "unknown error"))
+        return false
+    end
+
     local name = randomFileName()
     local fileName = name .. ".dfpwm"
 
     local fileData = response.readAll()
-    local file = fs.open(fileName,"w")
+    response.close()
+
+    local file = fs.open(fileName, "wb")
     file.write(fileData)
     file.close()
-    response.close()
+
     playSound(name)
     shell.execute("rm", fileName)
 end