I'm not sure what you want to see, so below is the code for the whole subroutine I'm writing

The whole reason I have this subroutine is for user to select some items in the @newSeqUnique array and return the selected array to the calling function

Currently the code is stuck at the MainLoop; statement

 
sub getSelectedSeq {
    my $newSeqUniqueRef = shift; my $grp = shift;
    my @newSeqUnique = @$newSeqUniqueRef;
    my @newSeqUniqueSorted = sort{$a->{ID} cmp $b->{ID} ||
                    $a->{folder} cmp $b->{folder}} @newSeqUnique;
    my @displayedArr; my $displayedStr;
    my @selectedArr;
    foreach (@newSeqUniqueSorted) {
        $displayedStr = $_->{ID}." - ".$_->{folder};
        push (@displayedArr, $displayedStr);
    }
    select STDOUT;
    foreach (@displayedArr) {
        print "$_\n";
    }

#    my $mw = MainWindow->new(-title=>"Select sequences");
    my $mw = new MainWindow;
    
    $mw->Label(-text => "Below is a list of sequences not found in exi
+sting group $grp table")->pack();
    $mw->Label(-text => "Please select sequences to be added to new ta
+ble")->pack();
    
    my $lb = $mw->Scrolled("Listbox",
               -scrollbars => "osoe",
               -height =>10,
               -width => 30,
               -selectmode => "extended");

        my $real_lb = $lb->Subwidget('scrolled');
        $real_lb->configure(-borderwidth=>2);
    $lb->insert("end", @displayedArr);
    $lb->pack(-fill=>"both");
    $mw->Button(-text => "Select",
                     -command => sub{@selectedArr=$lb->curselection;$m
+w->destroy();})->pack();
    $lb->selectionSet('end');
    $lb->see('end');
    MainLoop();

    foreach (@selectedArr) {
                print "$_\n";
        }
        
    my @arr; my @temp; my ($index, $ID, $folder, $obj);
    if ((@selectedArr)&&(defined $selectedArr[0])) {
        foreach (@selectedArr) {
            push (@arr, $newSeqUniqueSorted[$_]);
        }
    }else {
        @arr = ();
    }
    
    return \@arr;
}
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