# Overview<a name="EN-US_TOPIC_0000001115417926"></a>

-   [Display Effect](#section3997224182313)

This document describes how to quickly set up a development environment \(using the Hi3516D V300 development board\) and develop a clock app running on OpenHarmony. You can click  [here](https://gitee.com/openharmony/app_samples/tree/master/common/Clock)  to obtain the sample code.

## Display Effect<a name="section3997224182313"></a>

The Clock app displays the current time, as shown in the following figure.

**Figure  1**  Clock display effect<a name="fig7763172132019"></a>  


![](figures/clock.png)