More Advanced Timer Loop Computercraft

function main()
    --richiedo i valori
    print("Inserire l'intervallo: [float]")
    intervallo = read()
    print('Inserire il lato: [str]')
    side = read()
    --apro e scrivo il programma
    file = io.open("startup","w")

    file:write(
    'lato = '..side..'\n' ..
    'Durata = 0.05\n' ..
    'Intervallo = '..intervallo..'\n' ..
    'while true do\n' ..
    '\trs.setOutput(lato, true)\n' ..
    '\tsleep(Durata)\n' ..
    '\trs.setOutput(lato, false)\n' ..
    '\tsleep(Intervallo)\n' ..
    'end'
    )

    file:close()
    print('Setup completed! Rebooting...')
    sleep(1)
    os.reboot()
end

main()