Change how a column of Checkboxes display

[John H1]

I have two columns of checkboxes.

I need to be able to select one of the check boxes and have three additional checkboxes, but they need to be indented?

1 (box not checked)

2 (box checked)

       3 (new indented box)

       4 (new indented box)

[Kieran Anson]

If this is within a catalog item and exposed via service portal you can create a custom widget and display in a variable with type 'custom'. This will require you to have experience of developing widgets, HTML, CSS, and JavaScript