【Q】 Give me an UPLOAD-FORM Code which I can set with copying & pasting to my "Pages" or "Posts".

Yes. RL will give you 3 types of codes: div-type, table-type, and ul-type.

RL uses the div-type in the Live DEMO of UPLOAD-FORM:

div-type

ul-type

table-type

( 2017/September/26, 00:54:16, JST )