# Happy Pi Day Challenge

# Happy Pi Day Challenge

**#CCC is Back!**

International Pi Day is March 14th (3/14), let's celebrate by doing som Pi themed Pens!

I've been missing the CodePen Creative Challenges (#CCC) that used to happen regularly. So much creative inspiration and energy comes pouring out of them. Since Pi day is comming I thought it could be fun to have a Happy Pi Day Challenge.

**The "rules"**

- Create a Pen which has something to do with Pi.
- Post a link to your Pen in the comments below. No embedded Pens please (they would slow the page to a crawl) - images are ok.
- Tag Tweets and Pens #happypidaychallenge.
- I will add your Pen to Happy Pi Day Challenge Collection
- Starting now, ending Friday 18th.

I made one which compares the convergence speed of two algorithms for calculating Pi: Pi Calculator

For some inspiration you can explore the #pi tag on CodePen.

**Did you know:**

- Rajveer Meena has the world record for the most decimal places of Pi memorised: 70,000.
- Current record for calculating digits of Pi is 13,300,000,000,000 decimal places. It took 208 days!
- 3.14% of Sailors are PI rates?!

Math joke for "Pi Day." Consider a pizza with radius z and thickness a. Then, its volume is "pizza" (or pi*z*z*a)

— Cliff Pickover (@pickover) March 13, 2015

Now go create something to share with us!

An old pen of me :) http://codepen.io/gillescastel/full/qEqxOB/

Very nice @gillescastel !

Ԉ Shuffle

Wishing you all a HAPPY PI Day 2016!

Inspiration pi DAY 2013 ART POSTERS.

Using Math.PI to make a scalable circle: http://codepen.io/andreawetzel/pen/RaGLYw/

@tmrDevelops @enxaneta @andreawetzel

Great work!

Approaching π via Math.random :)

http://codepen.io/terabaud/pen/VaKEKV

A GUI to visualize angles in a circle :)

http://codepen.io/anthonydugois/full/JYoqqm/

Heartbeat of π - http://codepen.io/maicodes/full/bpBbKp/

Happy PI Day! :)

Happy Pi day to y'all! :D

Calculating Pi with sticks

Can I recite 10000 digits of Pi? Yes

Can I recite the first 10000 digits of Pi? No

Be specific :P

Pi Waves

Hi everyone - Newtons formula for PI is: PI / 2 = sum_n_from_0_to_inf(n! / (2 * n + 1)!!)

This can be written as: PI / 2 = 1 + 1/3 * (1 + 2/5 * (1 + 3/7 * (1 + 4/9 * (1 + ... ))))

http://codepen.io/ge1doot/pen/b1ee5038f33a369b502960aa6901fba7

Another PI-related work: PI disco :)

http://codepen.io/terabaud/pen/bpBpLV

http://codepen.io/danwilson/pen/wGoWGg/

Some pie timers overlayed with stroke widths and animation durations centered around pi.

Here's my rolling

`π`

~http://codepen.io/Rplus/pen/ZWLYLN

My last submission for this challenge: pi can draw awesome stuff :-) http://codepen.io/terabaud/full/oxBddY/

Hope you had a great St. Patrick's Day :) looking forward to 11/23/2016 (Fibonacci day) :)

@terabaud Fibonacci day, great idea!

A big thanks to all of you for the amazing Pens! This was a lot of fun =)