layer at (0,0) size 800x600
  LayoutView at (0,0) size 800x600
layer at (0,0) size 800x600
  LayoutBlockFlow {HTML} at (0,0) size 800x600
    LayoutBlockFlow {BODY} at (8,8) size 784x584
      LayoutBlockFlow (anonymous) at (0,0) size 784x128
        LayoutRuby (inline) {RUBY} at (0,0) size 512x128 [color=#0000FF]
          LayoutRubyRun (anonymous) at (0,0) size 512x128
            LayoutRubyBase (anonymous) at (0,0) size 512x128
              LayoutText {#text} at (0,0) size 512x128
                text run at (0,0) width 512: "ABCD"
        LayoutText {#text} at (0,0) size 0x0
      LayoutBlockFlow {DIV} at (0,128) size 784x128 [color=#008000]
        LayoutText {#text} at (0,0) size 512x128
          text run at (0,0) width 512: "EFGH"