layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x52
  RenderBlock {html} at (0,0) size 800x52 [bgcolor=#00FF00]
    RenderBody {body} at (8,16) size 784x20
      RenderBlock {p} at (0,0) size 784x20
        RenderText {#text} at (0,0) size 318x19
          text run at (0,0) width 318: "The background of the document should be green"
