Add list to list

[Gryphon2029]

I hope the title is explanatory but I want to be able to do the following but haven't wound a way:

set {_info::name} to "john"
set {_info::head} to player head
set {_info::money} to 5
loop random number between 1 and 7 times:
    add random item out of {@ext} to {_info::items::*}
add {_info} to {orders::*}

so {orders::1::name} would be john and {orders::1::items::1} would be something random and so on, thanks!