text: /* FIRST EXAMPLE */
  
  var svg = d3.select("#d3example")
    .append("svg")
    .attr("width", width)
    .attr("height", height);
  
  var exampleData = [{"name": "A"}, {"name": "B"}, {"name": "C"}, {"name": "D"}];
  var node = svg.append("g")
    .selectAll("examples_nodes")
    .data(exampleData)
    .enter();
  
  var circles = node.append("circle")
    .attr("cx", () => { return 70 + randRange(width - 70) })
    .attr("cy", () => { return 70 + randRange(height - 70) })
    .attr("r", 30)
    .data(exampleData)
    .style("fill", color)
    .style("fill-opacity", 0.7);
  