Doing multiple things at the same time

Using Arduino Programming Questions
1

I have a basic arduino setup, with a 216 lcd and a 44 numpad.

I am trying to achive to run a countdown on the top, while doing other things (example: writing numbers) on the bottom of the lcd.

This might be some advanced programming stuff, and I am very unfamiliar with the topic.

I tried making an integer and extract 1 after a 1000 delay, but it freezes the whole program, and whenever I update the screen every number I wrote on the bottom, disappears.

Any easy solutions? Tutorials in the topic?

Thanks in advance!

2

Yes there are links to tutorials about that in the permanent threads at the top of the forum...

3

Would you mind helping out, by telling me some keyword on how should I look for these tutorials?

4

See Using millis() for timing. A beginners guide, Several things at the same time and the BlinkWithoutDelay example in the IDE

5

realkorf:
Would you mind helping out, by telling me some keyword on how should I look for these tutorials?

Sure. Take your thread title, add "arduino", and submit it to Google.

6

And if you want help with your code in particular, it does help to actually post it (within </> code-tags)

7

If using Uno/Mega the millis() thing works well.

If using a Due, uMT works very well for threading.

If using a ESP32 under freeRTOS threading and multi-processing works very well.