Shutdown screen

function drawCenteredText(y, text)
    local w, _ = term.getSize()
    local x = math.floor((w - #text) / 2)
    term.setCursorPos(x, y)
    term.write(text)
end

function drawShutdownScreen()
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setTextColor(colors.white)

    local _, h = term.getSize()

    -- Draw Windows-like shutdown interface
    term.setBackgroundColor(colors.blue)
    term.clear()
    term.setCursorPos(1, 1)
    term.setTextColor(colors.white)
    drawCenteredText(3, "Doggy OS")

    term.setCursorPos(1, h - 5)
    term.setTextColor(colors.lightGray)
    drawCenteredText(h - 4, "Shutting down...")

    term.setCursorPos(1, h - 3)
    drawCenteredText(h - 2, "Thank you for using Doggy OS!")

    os.sleep(3)  -- Display the shutdown screen for 3 seconds

    term.setBackgroundColor(colors.black)
    term.clear()
    term.setTextColor(colors.white)

    drawCenteredText(math.floor(h / 2), "Goodbye!")

    os.sleep(2)  -- Pause for 2 seconds before shutting down

    os.shutdown()
end

-- Main script execution starts here
drawShutdownScreen()