svg learning - smiley face

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="https://d3js.org/d3-path.v1.min.js"></script>
	<script src="https://d3js.org/d3-shape.v1.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)

svg.append("text")
      .text("Edit the code below to change me!")
      .attr("y", 200)
      .attr("x", 120)
      .attr("font-size", 36)
      .attr("font-family", "monospace")*/

</script>
  <svg width="960" height="600"><rect width="30" height="50" fill="blue" X="30" Y="50"></rect></svg>
  <script>

const svg = d3.select("svg");
    svg.style('background-color', 'pink');

const height = +svg.attr("height");
    const width = +svg.attr("width");
    const eyespacing = 70;
    
    const g = svg.append("g")
    	.attr("transform", "translate(" + width / 2 + "," + height / 1.5 +")");

const circle = g.append("circle")
    			.attr("r",250)
    			.attr("fill", "#ffdc73")
    			.attr("stroke", "black");
    
    const leftEye = g.append("circle")
      		.attr("cx", - eyespacing)
        	.attr("cy", - eyespacing)
    			.attr("r",20)
    			.attr("fill", "green")
    			.attr("stroke", "black");
    
    const rightEye = g.append("circle")
      		.attr("cx", eyespacing)
    			.attr("cy", - eyespacing)
    			.attr("r",20)
    			.attr("fill", "blue")
    			.attr("stroke", "black");
    
    const smile = d3.arc()
    			 .innerRadius(80)
   				 .outerRadius(100)
   				 .startAngle(Math.PI/2)
   				 .endAngle(Math.PI * 3/2);

var background = g.append("path")
    .style("fill", "red")
    .style('stroke', "black")
    .attr("d", smile)
    
    
   
                 
  </script>
</body>

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

https://d3js.org/d3-path.v1.min.js

https://d3js.org/d3-shape.v1.min.js