**How big is two tweets?**

If one tweet is 140 characters long, well you guessed it right, two tweets is 280 characters! Here is a sample of what two tweets could look like :

This is a sample tweet written to show how many characters can fit in the first tweet. This is a sample tweet written to show how many ch…This is a sample tweet written to show how many characters can fit in the first tweet. This is a sample tweet written to show how many ch…

So, how much content can you squeeze in 280 characters of code? This was the question asked by Shadertoy user Nimitz when he started the **“Two Tweet Challenge”**. The challenge received **more than 100 submissions**, incredible! And the results are crazy, as in crazy awesome, but before looking at some of my favorites, here are the links to the official competition and the official winners:

Contest Information

Judging Information

The Results

See all Submissions

So now, let’s take a look at how much code you can put in 280 chars. Below you can find the code to generate the shader called Metasin, which I made for the competition, this one is only 252 chars:

void main(){vec4 q=gl_FragCoord/iResolution.xyzx; float t=iGlobalTime*0.15;for(float i=1.;i<30.;i+=1.) q.w+=1.-smoothstep(.0,.15,length(q.xy-vec2(i/30.+sin(i+t),.5+.3*sin(q.x*10.*sin(t)+t)))); gl_FragColor=vec4(1.-q.w)*4.*sqrt(q.x*q.y*(1.-q.x)*(1.-q.y));}

Let’s not forget how much real-time graphics have changed over the last 15 years! Check out these two videos (uploaded by PerfectHandVideos) that gather lots of demos from NVIDIA, ATI/AMD and others. Totally amazing.

Elliot Kotek is the co-founder of Not Impossible Labs, a company that crowd-solve healthcare issues using crowd-sourcing. During his keynote at Siggraph 2014 he introduced several of their projects (including Project Daniel), but more importantly he showed everyone how to really **change lives with technology**.

Beautiful.