CodePen Embed - d3.js p code

<p></p>
<p></p>
<p></p>

p{
  width: 100px;
  height: 100px;
  margin: 10px;
  border: 1px solid #000;
  display: inline-block;
}

d3.selectAll("p").style("background", function(d, i) {
  return i % 2 ? "#fff" : "#000";
});

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