Add/Merge 2 lists

Hi all,

i have one problem. I have 2 lists (see pic my_2_lists) and i want to add the second list to the first one.

My problem is that i want to add the first element from the second list after the last element from the first list.

Somehow i added the lists (see pic my_solution) but it is not what im looking for.

Can someone tell me please how to make this work?

Thank you,

Raul