Spiral Triangle III by mbostock

index.html

<!DOCTYPE html>
<meta charset="utf-8">
<style>

path {
  fill: #fff;
  stroke: #000;
}

</style>
<svg width="960" height="500">
  <defs>
    <clipPath id="clip-upper">
      <rect width="960" height="305" x="-480" y="-305"></rect>
    </clipPath>
    <clipPath id="clip-lower">
      <rect width="960" height="195" x="-480" y="0"></rect>
    </clipPath>
  </defs>
  <g clip-path="url(#clip-upper)" transform="translate(480,305)"></g>
  <g clip-path="url(#clip-lower)" transform="translate(480,305)"></g>
</svg>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="cubehelix.min.js"></script>
<script>

var width = 960,
    height = 500,
    triangleSize = 400,
    symbolCount = 71,
    angularSpeed = .08,
    colorSpeed = angularSpeed / 240;

var color = d3.scale.cubehelix()
    .domain([0, .5, 1])
    .range([
      d3.hsl(-100, 0.75, 0.35),
      d3.hsl(  80, 1.50, 0.80),
      d3.hsl( 260, 0.75, 0.35)
    ]);

var symbol = d3.selectAll("g")
  .selectAll("g")
    .data(function(d, i) { return i ? [0, 1, 2] : [2, 0, 1]; })
  .enter().append("g")
    .attr("transform", function(i) { return "rotate(" + (i * 120 + 60) + ")translate(0," + -triangleSize / Math.sqrt(12) + ")"; })
  .selectAll("path")
    .data(d3.range(symbolCount))
  .enter().append("path")
    .datum(function(i) { return i / symbolCount; })
    .attr("d", d3.svg.symbol().type("cross").size(4000));

d3.timer(function(elapsed) {
  symbol
      .style("fill", function(t) { return color((t * 2 + elapsed * colorSpeed) % 1); })
      .attr("transform", function(t) { return "translate(" + (t - .5) * triangleSize + ",0)rotate(" + (t * 120 + elapsed * angularSpeed) + ")"; });
});

</script>

cubehelix.min.js

!function(){function e(e){return function(a,i){a=d3.hsl(a),i=d3.hsl(i);var r=(a.h+120)*t,l=(i.h+120)*t-r,h=a.s,s=i.s-h,u=a.l,o=i.l-u;return isNaN(s)&&(s=0,h=isNaN(h)?i.s:h),isNaN(l)&&(l=0,r=isNaN(r)?i.h:r),function(t){var a=r+l*t,i=Math.pow(u+o*t,e),c=(h+s*t)*i*(1-i),d=Math.cos(a),N=Math.sin(a);return"#"+n(i+c*(-.14861*d+1.78277*N))+n(i+c*(-.29227*d-.90649*N))+n(i+1.97294*c*d)}}}function n(e){var n=(e=0>=e?0:e>=1?255:255*e|0).toString(16);return 16>e?"0"+n:n}var t=Math.PI/180;d3.scale.cubehelix=function(){return d3.scale.linear().range([d3.hsl(300,.5,0),d3.hsl(-240,.5,1)]).interpolate(d3.interpolateCubehelix)},d3.interpolateCubehelix=e(1),d3.interpolateCubehelix.gamma=e}();