Note

The wasCircularListForward function takes as input a circular list and permutes all the elements forward. An example call is the following: 

list a = [ 1, 2, 3, 4, 5 ];
a = wasCircularListForward(a);

after which the contents of the list a will be: 

5 1 2 3 4

Code

///////////////////////////////////////////////////////////////////////////
//  Copyright (C) Wizardry and Steamworks 2014 - License: GNU GPLv3      //
///////////////////////////////////////////////////////////////////////////
list wasCircularListForward(list input) {
    string in = llList2String(input, -1);
    input = llDeleteSubList(input, -1, -1);
    return llListInsertList(input, [in], 0);
}