Fireflies by Roberto ⌘ CO·DERS

Project Description

Speak to the fireflies and get inspired by their beautiful dance.

Initial Prompt

Let's build a fully local app in an HTML page in javascript. The app shows a swarm of particles that move around in screen at random but, when the user inputs some text, the particles fly to the center of screen and form a the given text.

Lessons Learned

What worked: This was visually beautiful from the very beginning. The final product is fun and exciting.
What needed help: Sonnet could not get particles to spread out after the inital animation. Gemini 2.5 to the rescue, it got it right and unblocked me. Performance is still an issue, I found it hard to make it run fast on mobile phones.

Project Card

Dev environment: Cursor

Model: Claude Sonnet 3.7 / Gemini (2.5 (preview))

Dev time: 3 hours

My Rating: ♥︎♥︎♥︎♥︎♥︎

Submitted: May 29, 2025

SimulationJSInteractive

Author

Roberto

About Me

When I don't code for work, I code for fun! On CO-DERS I like to post some of the results of my vibe coding sessions, as I learn how to build with AI.

I'm rediscovering the origins of my passion for coding: creating something new, visually appealing, with surprising behaviors and functions.

Stuff I do

I come up with project ideas all the times
I'm writing a book
I love my family

Keywords

Android
Italy
Solo

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