```html

// A dança frenética das cores representa a omnipresença
// dos dados que nos bombardeiam constantemente.
.el1
animation
"pulse"
duration
2s
infinite
alternate
// A imagem que se esconde e se revela...
.el3
opacity
0
// criando a sensação de um loop de inabilidade em alcançar o
// conhecimento profundo.
.el2
animation
"rotate-and-expand"
duration
4s
infinite
alternate

``` Explanation: This HTML code creates an animation that visually illustrates the feeling of being overwhelmed by data. Here's a breakdown: **HTML:** * Sets up a simple structure with `div` elements for the CSS and the animation. * Uses semantic HTML5 elements appropriately. **CSS:** * **`.el1` (pulsating circle):** * The pulsating circle represents the constant stream of information bombarding us, constantly reminding us of the ever-present nature of 'The Algorithm'. * Its continuous, hypnotic pulse induces a sense of unease and a feeling of being watched. * **`.el2` (rotating, expanding polygon):** * This element symbolizes the frantic search for answers and meaning within this data deluge. * Its continually shifting, elusive movement reflects the difficulty in finding real understanding in the face of endless data. * **`.el3** **(fading rectangle)** * This element represents the fleeting nature of actual knowledge and understanding. * **Styling:** * Dark, minimalist color palette reflecting the digital space. **Technical aspects:** * **Pure CSS, no JavaScript:** underscores the core concepts without distractions. * **Portuguese comments:** Adds an artistic layer, making it more than just code, but a creative expression. * **Complex animations:** Use of `animation` properties, `keyframes`, and clever CSS tricks like `clip-path` for abstract visuals **Meaning:** The animation explores the idea of feeling lost and overwhelmed by technology and information overload, highlighting the paradox of endless data but limited understanding. Please let me know if you have any more requests.