**4.5 Dynamic effect design**

With the development of digital media technology, people are no longer satisfied with the visual impact brought by static pictures. The addition of dynamic effect can add interest to HTML5 and improve the overall viewing experience of users. HTML5 project needs a certain time to load materials. Therefore, expressive or transitional pages can be set on the loading page, which can not only attract users' attention and help them alleviate the boredom and anxiety caused by waiting, but also quickly and intuitively help users make their first impression of non-heritage categories, mobilize users' curiosity, and lay a foundation for the development of later contents. The dynamic effect of the design mostly serves the whole, highlights the focus of the picture, and makes the picture more vivid and HTML5 more expressive.

In addition, the dynamic effect of shaking of small elements in some scenes can be designed to add interest. There should be a proper number of dynamic effects. Too many dynamic effects will make the screen lack focus and dazzle users. And dynamic

effect should not be independent of the picture, but should consider the whole and maintain the overall rhythm of HTML5.
