Yvaral IV

Trying recreate this piece by Jean Pierre Yvaral that I saw at the Tate Modern, in London. I can't seem to find the specific piece online...

Part IV of V

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
</head>

var colorScaleOne = d3.scalePow()
        .exponent(.8)
        .domain([0, 25])
        .range(["#c9b9df", "#5e3f8d"]);

var colorScaleTwo = d3.scalePow()
        .exponent(.8)
        .domain([0, 25])
        .range(["#4d3d69", "#2f2541"]);

var width = window.innerHeight*.98,
        height = window.innerHeight*.98,
        margin = {top: 0, bottom: 0, right: 0, left: 0}

var svg = d3.select("body").append("svg")
        .attr("width", width + margin.left + margin.right)
        .attr("height", height + margin.top + margin.bottom)
      .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

// Thanks https://bl.ocks.org/nbremer/e944485869ac8fd57413a158e9d8aae0
    var defs = svg.append("defs");

//Create a radial Sun-like gradient
      defs.append("radialGradient")
        .attr("id", "sun-gradient")
        .attr("cx", "50%")  //not really needed, since 50% is the default
        .attr("cy", "50%")  //not really needed, since 50% is the default
        .attr("r", "50%") //not really needed, since 50% is the default
        .selectAll("stop")
        .data([
            {offset: "0%", color: "#fb732d"},
            {offset: "33%", color: "#fb222b"},
            {offset: "95%", color: "#801116"},
            {offset: "100%", color: "#2f3337"}
          ])
        .enter().append("stop")
        .attr("offset", function(d) { return d.offset; })
        .attr("stop-color", function(d) { return d.color; });

svg.append("circle")
        .attr("r", width/2)
        .attr("cx", width/2)
        .attr("cy", height/2)
        .style("fill", "url(#sun-gradient)");

var n = 6,
        quadrants = 4,
        rowHeight = height/2/n,
        cellWidth = width/2/n;

// Lay out quandrants
    var quadrants = svg.selectAll(".quadrant")
          .data(d3.range(quadrants).map(Object))
        .enter().append("g")
          .attr("class", "quadrant")
          .attr("transform", function(d, i) { 
            if(i == 0) {
              return "translate(0,0)"
            } else if(i == 1) {
              return "translate(" + width/2 + ",0)"
            } else if(i == 2) {
              return "translate(0," + height/2 + ")"
            } else {
              return "translate(" + width/2 + "," + height/2 + ")"
            }
          })

// within each quadrant, there is a 6 by 6
    var rows = quadrants.selectAll(".quadrant-row")
        .data(d3.range(n).map(Object))
      .enter().append("g")
        .attr("class", "quadrant-row")
        .attr("transform", function(d, i) { return "translate(0," + rowHeight*i + ")" })

var cells = rows.selectAll(".cell")
        .data(d3.range(n).map(Object))
      .enter().append("g")
        .attr("class", "cell")
        .attr("transform", function(d, i) { 
          console.log(90*this.parentNode.parentNode.__data__.valueOf());

var quadrantValue = this.parentNode.parentNode.__data__.valueOf();
          if(quadrantValue == 1) {
            return "translate(" + (cellWidth*i + cellWidth) + ",0) rotate(90)"
          } else if(quadrantValue == 2) {
            return "translate(" + (cellWidth*i) + "," + rowHeight + ") rotate(270)"
          } else if(quadrantValue == 3) {
            return "translate(" + (cellWidth*i + cellWidth) + "," + rowHeight + ") rotate(180)"
          } else {
            return "translate(" + cellWidth*i + ",0)"
          }})

// create clip paths for each 
    cells.append("clipPath")
      .attr("id","rect-clip")
      .append("path")
      .attr("d", "M0,0L 0," + (rowHeight*1/2) + "L" + (cellWidth*1/2) + "," + (rowHeight*1/2) + "L" + (cellWidth*1/2) + "," + (rowHeight) + "L" + (cellWidth) + "," + (rowHeight) + "L" + (cellWidth) + ",0Z")

// Making first triangle
    cells.append("path")
        .attr("clip-path","url(#rect-clip)")
        .attr("d", "M0,0 L 0," + rowHeight + "L" + cellWidth + ",0Z") 
        .style("fill", function(d, i) { 
          var quadrantI = this.parentNode.parentNode.parentNode.__data__.valueOf()
            , rowI = this.parentNode.parentNode.__data__.valueOf()
            , cellI = this.parentNode.__data__.valueOf()
            , val;

if(quadrantI == 3) {
              val = (5 - cellI) * (5-rowI);
            } else if (quadrantI == 2) {
              val = cellI * (5-rowI);
            } else if (quadrantI == 1) {
              val = (5 - cellI) * rowI;
            } else {
              val = cellI*rowI;
            }

return (quadrantI == 0 || quadrantI == 3)  ? colorScaleTwo(val) : colorScaleOne(val);
        });

// Make 2nd triangle
    cells.append("path")
        .attr("clip-path","url(#rect-clip)")
        .attr("d", "M0," + rowHeight + " L" + cellWidth + "," + rowHeight + "L" + cellWidth + ",0Z") 
        .style("fill", function(d, i) { 
          var quadrantI = this.parentNode.parentNode.parentNode.__data__.valueOf()
            , rowI = this.parentNode.parentNode.__data__.valueOf()
            , cellI = this.parentNode.__data__.valueOf()
            , val;

return (quadrantI == 0 || quadrantI == 3)  ? colorScaleOne(val) : colorScaleTwo(val);
        });

</script>
</body>

https://d3js.org/d3.v4.min.js