Thanks to the expansion of the functionality that the basic web scripts had experienced over the past decade, many effects that would have required loading and processing large files can now be achieved through much simpler code spread across said scripts. The scripts in question — HTML, CSS, and JavaScript — can easily produce visual effects that dynamically respond to such basic user inputs as moving the browser's scroll bar and moving around the cursor. As a result, contemporary websites for large businesses such as mainstream video game companies use page-scrolling effects to enhance Elements such as background immersion.

Since websites that aim to compete in the top positions on search engines' generated results pages are almost universally vertically aligned in their page structure, it is rare to see a website allow the user to shift the page horizontally and have visual elements respond to movements across that axis. A project uploaded onto codepen.io demonstrates how a horizontally scrolling set of background and foreground elements can achieve a novel sequence that tells a "story" while the user scrolls their browser's bar from left to right. It depicts a self-animating sketch of the famed movie character Godzilla walking through and past various pieces of scenery drawn in the same style.

The JavaScript file is by far the largest and the most stuffed with code because it dictates the positions and reactive states of all kinds of drawn elements, the pieces of text that pop up as Godzilla walks past them, and the ability to have the sequence properly reverse its direction as the user scrolls backward. In fact, the animated Godzilla graphic is flipped horizontally the moment the user starts scrolling back left. This graphic is a PNG file that is internally stored like a sprite sheet in a video game, with each frame of animation occupying a different position within the sheet. While the HTML file contains the data dictating where the Godzilla graphic walks, the JavaScript syntax is responsible for letting the user click a building to watch it disappear and have an array of rubble briefly fly from its position. For more information click here https://codepen.io/creativeocean/pen/poPexje.