gistfile1.txt

   perl_set $dice 'sub {
        if (@pool) {
            push @pool, shift @pool;
        } else {
            @pool = ("/test1", "/test2");
        }

        my $r    = shift;
        my $root = $r->variable("document_root");
        my $uri  = $r->uri;

        foreach my $path (@pool) {
            if (-f "$root/$path$uri") {
                return "$path$uri";
            }
        }

        return "";
    }';

    server {
        location / {
            try_files $dice =404;
        }
    }