$mw->after( 'idle',
    [ configure => $styleref_select_parent, -background => 'cyan' ],
);

##</code><code>##

$mw->afterIdle([ configure => $styleref_select_parent, -background => 'cyan' ]);

##</code><code>##

[ 'methodname', args... ], ...

##</code><code>##

$mw->after( 2000 => configure => $tree, -background => 'green' );