Streams

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

path {
  stroke: #000;
  fill-opacity: .8;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var width = 960,
    height = 500;

var m = 5, // number of series
    n = 90; // number of values

// Generate random data into five arrays.
var data = d3.range(m).map(function() {
  return d3.range(n).map(function() {
    return Math.random() * 100 | 0;
  });
});

var x = d3.scale.linear()
    .domain([0, n - 1])
    .range([0, width]);

var y = d3.scale.ordinal()
    .domain(d3.range(m))
    .rangePoints([0, height], 1);

var color = d3.scale.ordinal()
    .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56"]);

var area = d3.svg.area()
    .interpolate("basis")
    .x(function(d, i) { return x(i); })
    .y0(function(d) { return -d / 2; })
    .y1(function(d) { return d / 2; });

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

svg.selectAll("path")
    .data(data)
  .enter().append("path")
    .attr("transform", function(d, i) { return "translate(0," + y(i) + ")"; })
    .style("fill", function(d, i) { return color(i); })
    .attr("d", area);

</script>

https://d3js.org/d3.v3.min.js