JS1k: The JavaScript code golfing competition

w=a.width/=3,h=a.height/=3;for(i in g)g[i[1]+i[7]+i[i.length-1]]=g[i];with(g){for(ifr(RUR,rur()),uaa(RUR,new Float32Array([-1,-1,-1,9,9,-1]),35044),p=rrm(),t=0;s=rhr(ESR-t);oSr(s),thr(p,s))hoe(s,t++?"#ifdef GL_ES\nprecision highp float;\n#endif\nuniform float t;float a(vec3 b,float o){float c=.0,j;for(float j=.8;j<6.;j+=.7){c+=sin(b.x*j*j*2.)*cos(b.z*j*j-o)*.7/pow(j,2.5);b.xz=mat2(1.,-.4,.4,1.)*b.xz;}return c;}void main(void){float n=.5+sin(t)*.1,l=0.,d=l;vec3 p=vec3(l,-1.,-t),c=-normalize(gl_FragCoord.xyz/vec3("+w+","+h+",.5)-n);for(float i=0.;i<70.;i++){n=a(p,0.)-p.y;d+=n;p+=c*n*.4;l++;if(n<.05||d>60.) break;}l=1.-l/60.;n=max(.5-p.y,0.);gl_FragColor=vec4(mix(((a(p,1.6)+2.)*.1+l)*vec3(mix(.4,.0,min(1.,n*abs(a(p*.5,0.))+.7)))+min(1.,pow(a(p*2.,0.)*n,2.))*l,vec3(.9,.9,1.)+c.y*1.5,pow(min(d*.02,1.),2.)),1.);}":"attribute vec2 p;void main(){gl_Position=vec4(p,.5,1.);}");igm(p),srm(p),etr(0,2,5126,0,0,0),ney(0),s=+new Date,(l=function(){ras(RES,0,3),n1f(eon(p,"t"),.001*(+new Date-s)),requestAnimationFrame(l)})()}

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