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
layer at (8,8) size 784x500 transparent
  LayoutBlockFlow {DIV} at (0,0) size 784x500 [color=#FFFFFF] [bgcolor=#800000]
    LayoutText {#text} at (50,50) size 309x17
      text run at (50,50) width 309: "This content should be masked with a soft glow."