function ScatterPlot(){

  var model = Model();

  Reactivis(model)
    .svg()
    .margin()
    .xScale().xAxis()
    .yScale().yAxis()
    .rScale()
    .colorScale()
    .resize();

  model.when(["g", "data", "x", "y", "r", "color"], function(g, data, x, y, r, color){
    var circles = g.selectAll("circle").data(data);
    circles.enter().append("circle");
    circles
      .attr("cx", x)
      .attr("cy", y)
      .attr("r", r)
      .attr("fill", color)
    circles.exit().remove();
  });

  return model;
}