Additional modules: shield or microcontroller?

Guys, good afternoon. I'm adding modules to a project I have here. It turns out that these modules need to connect to the Arduino. Would it be better to create them as shields or microcontrollers? It works like an LED bar, has its digital pins and GND. Below are images of what I intend to do:

Hi maiza, to do what you want you have to know perfectly how to make a "subcircuit" which is what you intend to do. To do this, it is best to practice a little with something simple so that later you can tackle all your more complex projects yourself, okay? If you agree, I'll tell you...

Yes! I'll start by making some simpler ones and then I'll move on.. thank you!

Well, then we are going to make a simple subcircuit like what you want based on 5 LEDS connected to the Arduino pins that you say, but you have to keep in mind that simulide is not a printed circuit creator, but rather a simulator for electronic schematics.

We start:
a) Start simulide from scratch.
b) Draw the diagram: 5 LEDs with their resistors, both taken from the menu on the left of simulide by dragging it. All LEDS with grounded cathodes and resistors in series with each LED.
c) Take "package" from the menu.
d) Using properties, adapt the package size so that the 4 LEDs fit. The resistors will be 100 ohms.
e) Save the schematic and publish it here in zip.

I include an image to help you.
 Then we will continue with the next step...

I'll do it here! Wait for me, please, lol!

The file contains the circuit and the image of the front of the LED bar, is this correct?

Make this circuit, save it, and send it as zip, please.
(In the file sim1 are all the components on the screen.)

I didn't understand. Isn't the file already the created circuit? The resistor in my case will actually need to be 330 ohm, not 100 ohm. Is there any problem?

yes, we are following the steps to create a subcircuit, please be patient...
The vaule of the resistors is not important now.

see if the file is here in the post

No problem with your English.
The first circuit was a practice, now we will do the final one.
Now delete the LED circuit and make this other one.
change the package size to 11x27.

Don't send me files with the images it is OK...

Send the image, not the file.

I need to see here how you are doing it

See if you can open the file With the new test

Send me the image of your new circuit how you know how to do it.

Ah, sorry, I hadn't seen the message yet. Below are the images:

perfect!

Now make a folder with the name: MAIZA copy the sim1 file in this
folder.

Rename the *.sim1 to MAIZA.sim1

you have to copy the your image file of the led bar into the folder.

a) in package properties, in type select: board.
b) move the leds to package vertically to the right.

Send me image.

I already added the image to the folder

perfect!