var paragraphs = document.getElementsByTagName("p");
for (var i = 0; i < paragraphs.length; i++) {
var paragraph = paragraphs.item(i);
paragraph.style.setProperty("color", "blue", null);
}
d3.selectAll("p").style("color", "blue");
d3.select("body").style("background-color", "black");
d3.selectAll("p").style("color", function() {
return "hsl(" + Math.random() * 360 + ",100%,50%)";
});