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February 10th: Lights, Landscapes, and Lines

Newton's Light Bulbs

jh3y animates a Newton's Cradle made of lightbulbs with Greensock in this luminous Pen.

Powerful Feature Flag Management

Embrace continuous deployments with CloudBees Rollout. It's the safest way to deliver new features to any customer, at any time. Free Trial.

CSS Arcade Typography: Snow Bros. (1990)

"Pixelated typeface from the arcade game Snow Bros. drawn in CSS" by Lynn Fisher, as seen in Toshi Omagari's "Arcade Game Typography".

#CodePenChallenge: Lines and Direction

February's challenge theme is "The Elements of Design", and we kicked it off with lines & direction. Check out the Pens from week one, including ycw's series of animated shapes and curves made with shimmering lines.


Toshiya Marukubo's peaceful winter is a bit different every time you look at it, thanks to its randomly generated snowfall and trees.

Card Hover Interactions

"Hacking together a solution to show part of an element in a card as a default state, lining up the element headline across each card and then animating the element to the center of its parent element." From Ryan Mulligan.

CodePen Radio #254: Design Tools

Klare and Chris talk about the design tools used at CodePen, and why we landed on the apps that we did.

Smashing Conf SF 2020

Let’s rock’n’roll! For SmashingConf SF 2020, April 21–22, we’re bringing back two full days packed with front-end, UX and all that jazz! Live sessions on performance, accessibility, interface design, copywriting, designing for emotion, debugging and fancy CSS/JS techniques — and a few surprises along the way.

Flowing Image - How To

Louis Hoebregts takes you step-by-step through the process of creating a "flowing" particle image with p5.js. Use the slider at the bottom of the screen to move through each step and watch the image start to flow.

TIL: CSS Media Queries

Gift Egwuenu takes a tour through the Media Queries Level 5 spec features prefers-color-scheme, prefers-reduced-motion, prefers-contrast, prefers-reduced-transparency, and prefers-reduced-data in this post on

Tilt Toggle

A playful toggle switch from Chris Gannon, built with a little help from Greensock (and gravity).

Stepping Feet illusion

Dev Loop brings a viral mindbending illusion to CodePen in CSS. Watch what happens when the black lines fade to gray.

A Web Dev's Valentine

"Show some love to that special person who gives your plain look much needed style." by Matt Smith, inspired by a greeting card design by PopAndShorty on Etsy.

Hot Vibes

Tigran Sargsyan serves up a steaming cup of SVG coffee in this highly-caffeinated Pen.