Posted on Oct 8 • Originally published at Alvaromontoro.Medium Ricardo Oliva Alonso has some fantastic 3D rooms coded in HTML and CSS. He built a room using ThreeJS this time, and the results are incredible. It is a beautiful, elegant room that can be rotated and zoomed in to see the details.In this demo of a progressively enhanced accordion component, Adrian Roselli shares some past choices for message colors (which coincidentally match the disability pride flag colors… “for funsies”).There are serious components and fun components. This is one of the latter. Ksenia Kondrashova brings an animated menu that would make the Nickelodeon team super-happy. Maybe not to use in production, but as a prototype, it is terrific.Mergim Ujkani creates an animated (and interactive) piece of CSS Art. Move the mouse in front of this submarine, and the lights will follow around… and all in HTML and CSS, without any JavaScript.Prepare to get your mind blown by Jane Ori. She coded an Arkanoid-style game entirely in HTML and CSS, without a single line of JavaScript in view… and the result is, well, you need to check it 😉Adam Kuhn (aka Cobra Winfrey) creates beautiful experiences. This month, he shared a fun pagination component for a CodePen Challenge. Click on the different pages, and see the component bend and throw the ball to the correct location.Ksenia Kondrashova repeats in this month’s list. In particular with a particle experiment that shows the physics of particles when rotating and shaking a box. The movement is natural and hypnotizing.Who said that components have to be boring? This form and file-upload component are proof of the contrary. Microinteractions, previews, and animations create a wholesome experience beautifully crafted by Nicolas Jesenberger.This generative art demo by LoFi is classy and elegant. I like the simplicity in the design and how the colors combine to create an experience reminiscing the 70s—a great job.A low-poly octopus drawn in 3D CSS by Fitz. Click on the Play button to see it animated. The octopus movement is natural (or as natural as it can be for a low-poly version). It makes it an impressive demo if you want to see animations, trigonometric functions, and 3D CSS together in action.And that’s all for the September list. For more cool CodePen demos, check last month’s article: https://dev.to/alvaromontoro/10-cool-codepen-demos-august-2023-bgeTemplates let you quickly answer FAQs or store snippets for re-use.Wow. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. Hide child comments as well Confirm For further actions, you may consider blocking this person and/or reporting abuse Radu-Alexandru B - Sep 29 Yeow Zi Qin - Sep 30 ByteBricks.ai - Oct 4 Ramesh Kannan - Sep 25 Once suspended, alvaromontoro will not be able to comment or publish posts until their suspension is removed. Once unsuspended, alvaromontoro will be able to comment and publish posts again. Once unpublished, all posts by alvaromontoro will become hidden and only accessible to themselves. If alvaromontoro is not suspended, they can still re-publish their posts from their dashboard. Note: Once unpublished, this post will become invisible to the public and only accessible to Alvaro Montoro. They can still re-publish the post if they are not suspended. Thanks for keeping DEV Community safe. Here is what you can do to flag alvaromontoro: alvaromontoro consistently posts content that violates DEV Community's code of conduct because it is harassing, offensive or spammy. Unflagging alvaromontoro will restore default visibility to their posts. DEV Community — A constructive and inclusive social network for software developers. With you every step of your journey. Built on Forem — the open source software that powers DEV and other inclusive communities.Made with love and Ruby on Rails. DEV Community © 2016 - 2023. We're a place where coders share, stay up-to-date and grow their careers.