layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x584
      RenderBlock (anonymous) at (0,0) size 784x128
        RenderInline {RUBY} at (0,0) size 512x128 [color=#0000FF]
          RenderInline (generated) at (0,0) size 512x128
            RenderText {#text} at (0,0) size 512x128
              text run at (0,0) width 512: "ABCD"
        RenderText {#text} at (0,0) size 0x0
      RenderBlock {DIV} at (0,128) size 784x128 [color=#008000]
        RenderText {#text} at (0,0) size 512x128
          text run at (0,0) width 512: "EFGH"