How to make cascading custom fields dynamic using scriptrunner?

[venkatesh_rajput]

I have 3 cascading custom fields with the same parent list, as the parent list is same for all 3 of them I want to use scriptrunner in such a way that when I select a value in the parent list of the first cascading custom field, the same value should be selected in the parent list of the rest of the two cascading custom fields.