{
const container = d3.select(DOM.svg(600,300)).attr("style","border:solid 1px black")
container.append("line")
.attr("stroke","black")
.attr("x1",0)
.attr("y1",150)
.attr("x2",600)
.attr("y2",150)
const outer = container.append("g").attr("transform",`translate(${x},150)`)
const inner = outer.append('g').attr("transform",`rotate(${x})`)
inner.append("rect")
.attr('width',50)
.attr('height',50)
.attr("x",-25)
.attr("y",-25)
return container.node()
}