2 scales filled circle & circle

<!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!
    const width = 960, height = 500;
    
    var svg = d3.select("body").append("svg")
      .attr("width", width)
      .attr("height", height)
    	.append('g')
    	.attr('transform', `translate(${100}, ${height/2})`);
    
    let data = [{key: 'key1', k: 12, d: 45, c: '#D50000' }, {key: 'key2', k: 23, d: 34, c: '#64DD17' }];

let g = svg.selectAll('key')
    	.data(data)
    	.enter()
    	.append('g')
    	
      g.append("circle")
      .attr("r", d => d.d)
      .attr("cx", (d, i) => i*79)
      .style("stroke", d => d.c)
      .style("stroke-width", 2)
      .style("fill", 'none')
      
      svg.append('line')
      		.attr('x1', 0)
      		.attr('x2', 100)
      		.attr('y1', 0)
      		.attr('y2', 0)
      		.style('stroke', '#555')
      		.style('stroke-width', 20)
      		.style('stroke-linecap', 'round')
      
	
  </script>
</body>

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