Using Arrays to Make a Flag

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)
    
    var FrenchFlag= [{"fill": "blue", "x": 100}, {"fill": "white", "x":300}, {"fill": "red", "x":500}];
    
		console.log(FrenchFlag);
    
		svg.selectAll("rect") //select all variables "rect" from variable svg (var svg=)
    	.data(FrenchFlag)
    //identify varible FrenchFlag as data
    	.enter()
    //put this data into the svg file where we've selected everything
    	.append("rect")
    //when looking for the data, when it is found, make a rectange. This will make 3 rectanges, one for each object in the variable FrenchFlag
    	.attr("y", 100)
    	.attr("x", function(d) {return d.x;})
    //in object "x", look at the data (the value of x) and then return/show the data from x (in this case, the 3 objects will be generated at the specified x postions)
    	.attr("width", 200)
    	.attr("height", 400)
    //y, width, and height values are applied to all objects because they're all specified
    	.attr("fill", function (d) {return d.fill;})
    	.attr("stroke", "black")

</script>
</body>

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