const int HIGH$\_$TRANS$\_$PIN $=6$; $//$ Replace with the actual pin number for the HIGH transducer

const int LOW$\_$TRANS$\_$PIN $=7$; $//$ Replace with the actual pin number for the LOW transducer

const int PUMP$1\_$LED$\_$PIN $=12$; $//$ Replace with the actual pin number for the first pump LED

const int PUMP$2\_$LED$\_$PIN $=11$; $//$ Replace with the actual pin number for the second pump LED

const int ALARM$\_$LED$\_$PIN $=10$; $//$ Replace with the actual pin number for the alarm LED

unsigned long previousMillis $=0$;

const long interval $=30000$; $//30$ seconds interval

void setup$()\{$

pinMode$($HIGH$\_$TRANS$\_$PIN, INPUT$)$;

pinMode$($LOW$\_$TRANS$\_$PIN, INPUT$)$;

pinMode$($PUMP$1\_$LED$\_$PIN, OUTPUT$)$;

pinMode$($PUMP$2\_$LED$\_$PIN, OUTPUT$)$;

pinMode$($ALARM$\_$LED$\_$PIN, OUTPUT$)$;

$\}$

void loop$()\{$

unsigned long currentMillis $=$ millis$()$;

bool pump$1$Active $=$ true; $//$ Start with pump $1$

$//...($inside the loop$)$

if $($digitalRead$($HIGH$\_$TRANS$\_$PIN$)==$ HIGH$)\{$

$//...$

if $($pump$1$Active$)\{$

digitalWrite$($PUMP$1\_$LED$\_$PIN, HIGH$)$;

$//...($pump $1$ actions$)$

$\}$ else $\{$

digitalWrite$($PUMP$2\_$LED$\_$PIN, HIGH$)$;

$//...($pump $2$ actions$)$

$\}$

pump$1$Active $=!$pump$1$Active; $//$ Toggle active pump

$\}$

$//$ Check water level and take appropriate action

if $($digitalRead$($HIGH$\_$TRANS$\_$PIN$)==$ HIGH$)\{$

$//$ High level reached, start pumping

digitalWrite$($PUMP$1\_$LED$\_$PIN, HIGH$)$;

delay$(1000)$; $//$ Pumping time $($adjust as needed$)$

digitalWrite$($PUMP$1\_$LED$\_$PIN, LOW$)$;

$//$ Check if low level is reached within $30$ seconds

if $($digitalRead$($LOW$\_$TRANS$\_$PIN$)==$ LOW$)\{$

$//$ Low level reached, stop pumping

digitalWrite$($PUMP$2\_$LED$\_$PIN, LOW$)$;

digitalWrite$($ALARM$\_$LED$\_$PIN, LOW$)$;

$\}$ else $\{$

$//$ Low level not reached within $30$ seconds, activate second pump

digitalWrite$($PUMP$2\_$LED$\_$PIN, HIGH$)$;

delay$(10)$; $//$ Pumping time $($adjust as needed$)$

digitalWrite$($PUMP$2\_$LED$\_$PIN, LOW$)$;

$//$ Check if low level is reached within $30$ seconds

if $($digitalRead$($LOW$\_$TRANS$\_$PIN$)==$ LOW$)\{$

$//$ Low level reached, stop pumping

digitalWrite$($ALARM$\_$LED$\_$PIN, LOW$)$;

$\}$ else $\{$

$//$ Low level not reached within additional $30$ seconds, sound alarm

digitalWrite$($ALARM$\_$LED$\_$PIN, HIGH$)$;

$\}$

$\}$

$//$ Reset the timer

previousMillis $=$ currentMillis;

$\}$

$//$ Check if $30$ seconds have passed since the last check

if $($currentMillis $-$ previousMillis $>=$ interval$)\{$

$//30$ seconds passed, stop all pumps and alarm

digitalWrite$($PUMP$1\_$LED$\_$PIN, LOW$)$;

digitalWrite$($PUMP$2\_$LED$\_$PIN, LOW$)$;

digitalWrite$($ALARM$\_$LED$\_$PIN, LOW$)$;

$\}$

$\}$