layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x50
  RenderBlock {html} at (0,0) size 800x50
    RenderBody {body} at (8,16) size 784x18
      RenderBlock {p} at (0,0) size 784x18 [bgcolor=#00FF00]
        RenderText {#text} at (0,0) size 299x18
          text run at (0,0) width 299: "This sentence should have a green background."