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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
553•klaussilveira•10h ago•157 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
876•xnx•15h ago•532 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
79•matheusalmeida•1d ago•18 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
13•videotopia•3d ago•0 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
191•isitcontent•10h ago•24 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
190•dmpetrov•10h ago•84 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
7•helloplanets•4d ago•3 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
303•vecti•12h ago•133 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
347•aktau•16h ago•169 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
347•ostacke•16h ago•90 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
75•quibono•4d ago•16 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
444•todsacerdoti•18h ago•226 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
242•eljojo•13h ago•148 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
46•kmm•4d ago•3 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
17•romes•4d ago•2 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
379•lstoll•16h ago•258 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
225•i5heu•13h ago•171 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
103•SerCe•6h ago•84 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
162•limoce•3d ago•85 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
131•vmatsiiako•15h ago•56 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
41•gfortaine•8h ago•11 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
63•phreda4•9h ago•11 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
20•gmays•5h ago•3 comments

Show HN: ARM64 Android Dev Kit

https://github.com/denuoweb/ARM64-ADK
14•denuoweb•1d ago•2 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
262•surprisetalk•3d ago•35 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1035•cdrnsf•19h ago•428 comments

Zlob.h 100% POSIX and glibc compatible globbing lib that is faste and better

https://github.com/dmtrKovalenko/zlob
6•neogoose•2h ago•3 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
56•rescrv•18h ago•19 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
85•antves•1d ago•63 comments

WebView performance significantly slower than PWA

https://issues.chromium.org/issues/40817676
20•denysonique•6h ago•3 comments
Open in hackernews

Turtletoy

https://turtletoy.net/
317•ustad•2mo ago

Comments

susam•2mo ago
A few years ago, I wrote an esoteric, minimalistic turtle graphics language called CFRS[]: <https://susam.net/cfrs.html>.

This was an exercise in making a turtle graphics language that is as minimal as possible. It is closer to Brainfsck than JavaScript and it is not Turing complete, by design.

To see some demos, go to <https://susam.github.io/cfrs/demo.html>.

iberator•2mo ago
Interesting project. I guess you know Forth as well? :)
susam•2mo ago
Yes, I do! <https://github.com/susam/may4>

I have a Forth-inspired, esoteric, stack-based, postfix, colouring language too: <https://susam.net/fxyt.html>

Demos: <https://susam.github.io/fxyt/demo.html>

markknol•2mo ago
computer goes [[[[BRRRRRRRRRR]]]]
cryptonector•2mo ago
LOGO lives!
Sateeshm•2mo ago
LOGO was my first interaction with a computer back in 1996. We had to write one program in LOGO in our computer class and we were allowed to play one of the following three games for rest of the period: Dangerous Dave, Paratrooper, or Prince of Persia.
namanyayg•2mo ago
LOGO and Dangerous Dave were my childhood. I never was able to complete DAVE :(

(This was around 2005 for me!)

aitchnyu•2mo ago
Did we both study in Greets, Kochi?

We learned the same lessons for the parts of CPU, computer generations, Babbage and co for 5 years. Our lab exams was more means than ends, so `pir*2` will carry more marks than `3.14r*r`.

baumschubser•2mo ago
I got an Amstrad PCW handed down to me from my dad as my first PC around the same time.

Booted always with disk 1 and that was Locoscript and learned typing on that thing.

When I discovered there is a second disk that boots you in some dark and hidden alternative mode (read: CP/M) I felt like a hacker.

Hidden inside this cave was the only program the manual mentioned in this section: Logo! I did not know that my PC could display anything except characters and it was. so. amazing. to see self-drawn lines on that thing.

empressplay•2mo ago
To be fair, turtle graphics is not itself Logo, Logo was originally designed for text manipulation (because all schools had at that time were teletype terminals). Then came the idea of a physical turtle robot, then the graphical turtle when schools got computers with CRT displays.

My partner and I do maintain a complete (and extended) Logo interpreter however, so yes it really does live. Somewhat :)

cryptonector•2mo ago
The LOGO I got to use when I was 12 was practically a micro-Lisp with turtle graphics. JavaScript is a sort of a Lisp. Thus "LOGO lives" seems appropriate to me :)
cryptonector•2mo ago
> My partner and I do maintain a complete (and extended) Logo interpreter however, so yes it really does live. Somewhat :)

That's very cool!

russellbeattie•2mo ago
I want to preface this by noting that as an adult, I totally understand the intent behind LOGO, its use as an educational tool, and understand its historic place in computer history.

But as a pre-teen kid in the early 80s? I hated LOGO! I thought it was a baby language and I wanted to get back to doing cool stuff in BASIC. Ten year old Me thought LOGO was soooo dumb - you couldn't make a video game, so what use was it?

It seemed every year we'd have a grade school class using LOGO - for a math lesson, or an art project, or an "intro to computing", etc. I was always a classic 80s young computer nerd snob about it.

potato3732842•2mo ago
We did LOGO then some sort of watered down BASIC. Both were incredibly useless to my education because at no point was any serious attempt ever made to teach that these were the tip of any sort of computer programming iceberg. We were simply given lessons and assignments and told to things and we just did them without understanding what we were doing. At least with math they had some example applications for everything they taught us.

I have less than zero nostalgia for either.

cryptonector•2mo ago
You could peek and poke with LOGO... At least the one I used.
btbuildem•2mo ago
This is so neat. I quite like this one: https://turtletoy.net/turtle/782a9f5329
busterarm•2mo ago
LOGO on Apple IIs was my very first experience with programming. Seeing this puts a huge smile on my face.
the-mitr•2mo ago
Another addition to the Logo tree https://pavel.it.fmi.uni-sofia.bg/logotree/table.html
Duanemclemore•2mo ago
When I was seven I wrote a LOGO program on our school's Apple IIe to tile the (green monochrome) monitor with hexagons. It's all been downhill since.
SequoiaHope•2mo ago
That’s really cool! In adulthood I’ve learned about Seymour Papert and LOGO but I was never exposed to it when I was young. We did have early 90’s Macs in grade school.
Duanemclemore•2mo ago
Yeah, it was fun. I had no idea the theory at the time, but Papert et al were definitely on to something.
cwmoore•2mo ago
I made a “circle” but you could see the pixels. I can’t see the pixels anymore.
JSR_FDED•2mo ago
The glory days of hi-res graphics… 280x160 pixels!
Duanemclemore•2mo ago
This is what we've lost. ;)
zucked•2mo ago
Was this with the little turle as your cursor? Seeing the "older" kids who could manipulate that program/language to make stopmotion movies might have been the moment that set me on the path of "technology enthusiast" for the rest of my life. The scene of the dimmed computer lab with a whole group gathered around someone's monitor to watch the newest creation is forever etched in my memory.
Duanemclemore•2mo ago
It was! I even remember it was Terrapin LOGO - which amazingly seems to still be around. [0]

None of us ever made anything as good as a stop-motion. It didn't even occur to me to do anything that cool. But I was obsessed with geometry and patterns, and benefit from a group of us being allowed up into the middle school to use the computer at lunchtime recess.

When I was older and got official "Enrichment" classes after school I tackled the same pattern and figured out how to do it with a minimum of repeated line segments. I also figured I might as well do triangular and square tilings. But those were boring, as there isn't a repeated edge problem to solve.

[0] https://www.terrapinlogo.com/

zkmon•2mo ago
It's a weird feeling. I'm starting to loathe the very art I used to admire and spend lot of hours to create. It's like the Gulliver story where people were fed with lots of tasty food, by the monster.
andoando•2mo ago
This is really cool. Ive been thinking a lot about how to make a Turing complete visual language.
iberator•2mo ago
No screenshots?!

Not clear nor simple. Imo negligible use for teaching. If you know how to import modules and use library functions then you don't need LOGO anymore...

'KEYWORD(50)'

is always simpler than:

' turtle.function(value, value)'

Great project but missed the opportunity to develop your own LOGO interpreter from scratch in web assembly:)

empressplay•2mo ago
> Great project but missed the opportunity to develop your own LOGO interpreter from scratch in web assembly:)

There is one! We wrote it in Golang and compiled it to WebAssembly, it's a greatly extended version of Apple Logo ][:

https://turtlespaces.org

markknol•2mo ago
turtlespaces seemss ded
csmoak•2mo ago
turtletoy was made back around 2018 before web assembly was generally available.
markknol•2mo ago
It's build with JavaScript which is pretty common, makes it pretty accessible. Syntax is pretty easy to learn https://turtletoy.net/syntax
empressplay•2mo ago
Great stuff, kind of like the turtle graphics library for p5.js.

If you want to create much fancier graphics (and games!) in actual Logo, check out turtleSpaces:

https://turtlespaces.org

markknol•2mo ago
turtlespaces seems dead
antris•2mo ago
I wish you could export these in higher res and 16:9, would make good background images
SequoiaHope•2mo ago
Yes there’s one I’d like to print out. There must be some way to render this at higher res. Does anyone know?
csmoak•2mo ago
you can download each as an SVG and then render it out at any resolution using something like inkscape
throwaway2046•2mo ago
Click on the drawing that you like on the website, then click the download button and choose "Export as SVG". You can then open the SVG file in Inkscape and render as PNG/JPG at any resolution you want. Let me know if you need help.
SequoiaHope•1mo ago
That’s great thank you! I missed that option.
01HNNWZ0MV43FF•2mo ago
Can't I slow down the drawing to watch it work?
csmoak•2mo ago
i made some art on this site years ago. some people used this to make plottable art. plotting it is definitely a slower way to watch it work through a drawing :)
markknol•2mo ago
you actually can but it is a workaround: You can export as gif, then it'll draw slowly
matsemann•2mo ago
Similar: https://www.dwitter.net/

Where you get 140 characters to draw using code. (Similar as in the resulting pictures reminded me of dwitter)

teruakohatu•2mo ago
That is really interesting. Pity half of them use a "eval(unescape(escape(x)).replace(/u../g,'')))" with a compressor and decoder function.
_kb•2mo ago
https://tixy.land/ is another where the constraints encourage creativity. A lot of these tools are a little like tiny demoscene.
Sabr0•2mo ago
HAHA it brings back memories!
markknol•2mo ago
Such a nice project!! I made several turtles too, check https://turtletoy.net/user/markknol
jalk•2mo ago
I stumbled over your string art turtle some time ago and like one of the commenters on [1], I was wondering about your tool to create points from a image

[1] https://turtletoy.net/turtle/dd4c8beb92

markknol•2mo ago
Thanks! If you wanna do more, i wrote a bit about it on x/twitter, recently 3d printed an object to actually test such string art. if you have specific questions, happy to answer ofc! https://x.com/mknol/status/1993708617586077928
cwmoore•2mo ago
Nice collection, lots of variety. For "Fake Hyperbolic Plane..." [1] I can suggest looking up the Method of Apollonius, in order to make the circles all touch without overlapping or gaps.

[1] https://turtletoy.net/turtle/0975488621

mangodrunk•2mo ago
These are great, thanks for sharing. Are there any resources you recommend for this? I have come across the book Turtle Geometry but haven’t read it.
cubefox•2mo ago
This is what "computer art" and "generative art" meant for decades: relatively short programs generating interesting pictures. Today's text-to-image models are quite different from that.

(But I think even for diffusion models, interesting pictures that come from very short or unspecific prompts are more in the spirit of classic generative art, as they don't try to describe specific details explicitly.)

WillAdams•2mo ago
This is a fun sort of project --- couldn't resist knocking out an implementation for OpenPythonSCAD:

https://github.com/WillAdams/gcodepreview/blob/main/tdmt.py

https://github.com/WillAdams/gcodepreview/blob/main/threeDmo...

(and yes, the full name (3-Dimension Model Turtle) does have the same number of syllables as a certain for letter franchise staring beings named for a certain quartet named after Italian Renaissance artists)

wffurr•2mo ago
Three dimensional model turtle doo dah, doo dah.
scientist4397•2mo ago
I can say, I didn't do so beautiful pictures back in the 80's in my French School