Toms first block

<!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", 899)
      .attr("height", 617)
    
    var xScale = d3.scaleLinear()
    	.domain([0,34404])
    	.range([85,783]);
    var yScale = d3.scaleLinear()
			.domain([-56,66])
    	.range([1004,106]);
    var rScale = d3.scaleSqrt()
    	.domain([0,938105715])
    	.range([0,100]);
    
    d3.csv("gapminder_avg.csv",function(dataWeLoaded) {
     console.log(dataWeLoaded);
      
     svg.selectAll("circle")
     	.data(dataWeLoaded)
     	.enter()
     		.append("circle")
     		.attr("cy", function(d) { return yScale(+d.lifeexp);})
        .attr("cx", function(d) { return xScale(+d.gdp);})
        .attr("r", function(d) { return rScale(+d.population);})
     		.attr("fill-opacity", 0.5)
     		.attr("stroke", "Orange")
     		.attr("stroke-width", 2)
        .attr("fill", function(d) {return d.color})     
                                   
      })
  
  </script>
</body>

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