this is the first method.
the second one is complicated, I can't find the portal link, you have to change a bunch of numbers... Sandro and Leia once sent a link in a private message, but it's still complicated.
the third and easiest method is to simply copy ready-made objects from another map using a buffer...
By the way, the program is available in the portal's "treasure trove". There are many other "treasures" there, it's interesting - take a look.