subplot(511), plot(time,keran), grid on, ylabel('keran [liter/sec]')
subplot(512), plot(time,katup), grid on, ylabel('katup [BUKA/TUTUP]')
subplot(513), plot(time,pompa), grid on, ylabel('pompa [ON/OFF]')
subplot(514), plot(time,air_masuk), grid on, ylabel('air masuk [liter/sec]')
subplot(515), plot(time,level), grid on, xlabel('time [seconds]'), ylabel('level [cm]')