Javascript checked boxes filling a text box

[Chris_N24]

So here's a Javascript I'm using to check read only checkboxes:

var v = event.target.value;
var f = this.getField("Comp 1");
f.value = v;
var v = event.target.value;
var f = this.getField("Comp 6");
f.value = v;
var v = event.target.value;
var f = this.getField("Comp 11");
f.value = v;
var v = event.target.value;
var f = this.getField("Comp 16");
f.value = v;

As stated, comp 1, 6, 11, and 16 are read only boxes. The checkbox that contains the above script is named "Selection 1". As shown in the script above, when "Selection 1" is checked, it checks 1, 6, 11, and 16. What I need to happen is that when those read only boxes are checked, it fills out a text field called "List", but in a list format as follows:

Spades (this is Comp 1)

Clubs (This is Comp 6)

Diamonds (This is comp 11)

Hearts (This is Comp 16)

Instead of:

Spades, Clubs, Diamonds, Hearts.

I've tried to put the following script in Comp 1:

if (this.getField("Comp 1").value!="Off")
this.getField("List").value = "Spades";
else this.getField("List").value ="";

But nothing shows up in the "List" text field. I've tried undoing the read only thing and just checking the boxes, and that kind of works, but the problem is that each new check mark overwrites the last checkbox entry (Comp 6 overwrites Comp 1, etc). I need it to not do that. I need it to list each checked box without deleting the prior entry. In a nutshell:

Selection 1--> Checks Comp 1, 6, 11, and 16 --> Comp 1, 6, 11, 16 checked--> Fills out List.

Just to be clear, I know next to nothing about Javascript. I picked up the above scripts in the past few days from the community posts here and edited them to work for what I have going on. Any and all help would be appreciated! Thank you!

[Thom Parker]

Use a calculation script in the text box to build the list of items based on the values of the checkboxes.

Watch the videos here to get a handle scripting Acrobat.

https://www.pdfscripting.com/public/Free_Videos.cfm#FormJS

Here are articles on calculations:

https://acrobatusers.com/tutorials/how-to-do-not-so-simple-form-calculations/

https://www.acrobatusers.com/tutorials/conditional-execution/

[Chris_N24]

A lot of the links don't pull up a video, or they don't have a link at all. Not even the Calculation script thing.

[Thom Parker]

The top 3 videos under form scripting are free and have link. The others are for members only. But you only need the first 3 to get started.