{
const container = d3.select(DOM.svg(600,300)).attr("style","border:1px black solid")
container.append("circle")
.attr("r",50)
.attr("fill","steelblue")
.attr("stroke","black")
.attr("cx",300)
.attr("cy",150)
container.append("rect")
.attr("width",70)
.attr("height",70)
.attr("y",150)
.attr("x",x)
return container.node()
}