ComputerCraft / Wait for disk

while true do
    -- Wait for disk
    while not fs.exists("/disk/startup") do
        os.pullEvent("disk")
        -- might cause problems, maybe use os.pullEvent() without arguments
    end

    -- Launch disk
    shell.run("/disk/startup")

    -- Wait for disk ejection and clear
    while fs.exists("/disk/startup") do
        os.pullEvent("disk_eject")
        -- might cause problems, maybe use os.pullEvent() without arguments
        term.clear()
        term.setCursorPos(1, 1)
        -- os.reboot() works too to clear the screen
    end
end