D3 Examples - block with text

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<!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>
    var wide = 150;               var high = 150
    var texX = wide/4 - 20;   var texY = high/2 + 10
        
    var svg = d3.select("body")
        .append("svg")
        .attr("width", 1500)
        .attr("height", 500)
​
        svg.append('rect')
        .attr('width', wide)
        .attr('height', high)
        .attr('x', 10)
        .attr('y', 10) 
        .style('fill', 'red')
    
    svg.append('rect')
        .attr('width', wide)
        .attr('height', high)
        .attr('x', wide+30)
        .attr('y', 10) 
        .style('fill', 'blue')
​
   svg.append("text")
      .text("Red box!")
      .attr("x", texX)
      .attr("y", texY)
      .attr("font-size", 25)
      .attr("font-family", "monospace")
    
   texX = texX+wide+20
   
    svg.append("text")
      .text("Blue box!")
      .attr("x", texX)
      .attr("y", texY)
      .attr("font-size", 25)
      .attr("font-family", "monospace")
​
​
  </script>
</body>
​
    