Kernel Power Loss screen

-- Clear the screen and set up colors
term.clear()
term.setBackgroundColor(colors.black)
term.setTextColor(colors.white)
term.clear()

-- Define the width and height of the screen
local width, height = term.getSize()

-- Helper function to center text on the screen
local function centerText(y, text, textColor)
    local x = math.floor((width - #text) / 2)
    term.setCursorPos(x, y)
    term.setTextColor(textColor)
    term.write(text)
end

-- Function to display the error screen
local function showErrorScreen()
    -- Display the dog ASCII art with red Xes for eyes
    local dogArt = {
        "     |\\_/|                  ",
        "     | ? ?   KERNEL ERROR!   ",
        "     |   <>              _   ",
        "     |  _/\\------____ ((| |))",
        "     |               `--' |  ",
        " _____|_       ___|   |___.  ",
        "/_/_____/____/_______|       "
    }

    local startLine = math.floor((height - #dogArt) / 2) - 2

    -- Display the dog ASCII art with red Xes for eyes in red
    term.setTextColor(colors.red)
    for i, line in ipairs(dogArt) do
        centerText(startLine + i, line, colors.yellow)
    end

    -- Display error message below the dog ASCII art in white
    term.setTextColor(colors.white)
    centerText(startLine + #dogArt + 2, "Kernel Power Loss", colors.white)
    centerText(startLine + #dogArt + 3, "", colors.white)

    -- Move "Press F1 to continue boot" to the bottom in white
    centerText(height - 2, "Press F1 To continue boot", colors.white)

    -- Listen for F1 key press to delete ACPI.signal and run /disk/boot/start-check.lua
    while true do
        local event, key = os.pullEvent("key")
        if key == keys.f1 then
            -- Delete ACPI.signal if it exists
            if fs.exists("/disk/boot/ACPI.signal") then
                fs.delete("/disk/boot/ACPI.signal")
            end
            -- Run /disk/boot/start-check.lua if it exists
            if fs.exists("/disk/boot/start-check.lua") then
                shell.run("/disk/boot/start-check.lua")
            end
            break  -- Exit the loop after F1 is pressed
        end
    end
end

-- Check if ACPI.signal exists
if not fs.exists("ACPI.signal")
then
shell.run("delr.lua")
showErrorScreen()

else
shell.run("/disk/boot/start-check.lua")

end