body {
  margin: 0;
}

rect {
  stroke: #fff;
  stroke-width: .1px;
}

var w = 960,
    h = 500,
    z = 20,
    x = w / z,
    y = h / z;

var svg = d3.select("body").append("svg")
    .attr("width", w)
    .attr("height", h);

svg.selectAll("rect")
    .data(d3.range(x * y))
  .enter().append("rect")
    .attr("transform", translate)
    .attr("width", z)
    .attr("height", z)
    .style("fill", function(d) { return d3.hsl(d % x / x * 360, 1, Math.floor(d / x) / y); })
    .on("mouseover", mouseover);

function translate(d) {
  return "translate(" + (d % x) * z + "," + Math.floor(d / x) * z + ")";
}

function mouseover(d) {
  this.parentNode.appendChild(this);

  d3.select(this)
      .style("pointer-events", "none")
    .transition()
      .duration(750)
      .attr("transform", "translate(480,480)scale(23)rotate(180)")
    .transition()
      .delay(1500)
      .attr("transform", "translate(0,0)");
}