# 3 - TimeMachine

Your second app, a clock application. This is a single-window app made without ProjectCenter. Of course, you can use ProjectCenter if you want.

```{toctree}
---
maxdepth: 1
caption: Contents
---
3.1.md
3.2.md
3.3.md
3.4.md
```

## Topics

* Updating your UI
* Custom Views
* Drawing custom shapes
* Dynamically creating widgets
* Modal Windows
* Configuring your app
* Notifications

## Copyright

This tutorial was adapted from [the GNUstep Programming Tutorial](http://gnustep.made-it.com/GSPT/xml/Tutorial_en.html#AEN501). Note that it does not use ProjectCenter.

Copyright © 2003 Yen-Ju Chen, Dennis Leeuw

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

Copyright (c) 2022 by Ethan C