Wordclock easy script

Hi everyone!

I’ve been searching alot for a simple wordclock script that works with 4x MAX7219. (16x16) or 256 LEDs.
The only decent programming script i’ve found is from Brett.

But it has a few things that I definitely don’t need. I need this for my end project.
But at the end I have to explain everything about the script. Even the tabs that goes with it.

Things I definitely don’t need are:
Games liks tetris, game of life and simon???
a doppler radar module
Temperature & humidity DHT
Buzzer
LDR
Or Having more modes like digital and analogue clock.

And the next questions are… is it possible to run a RTC with only batteries, so I don’t have to build an another power supply?
And instead of Chicago fasterners, using a few normal switches?

Btw I use a Arduino uno… I can put an adapter and connect to the net.
So it’s not dependable to a computer

I would looooove a fast reaction <3

Thanks for your time !!

is it possible to run a RTC with only batteries

Yes, but why not simply power it from the Uno ?

UKHeliBob:
Yes, but why not simply power it from the Uno ?

I'll but only if there is any other scrip I can hold on to.. Where I simple only use an RTC and switches.
Tbh, i'm a beginner and i'm just at that stage where I simple only have to explain the script and not have to make one by my own.

Thank you