user
Task

Display the string       **Goodbye, World!**       on a GUI object   (alert box, plain window, text area, etc.).

Related task

* Hello world/Text
assistant
(formerly Perl 6)

**Works with**: Rakudo version 2018.03

**Library:** GTK

```
use GTK::Simple;
use GTK::Simple::App;

my GTK::Simple::App $app .= new;
$app.border-width = 20;
$app.set-content( GTK::Simple::Label.new(text => "Goodbye, World!") );
$app.run;
```