1 layer at (0,0) size 800x600
2 RenderView at (0,0) size 800x600
3 layer at (0,0) size 800x600
4 RenderBlock {HTML} at (0,0) size 800x600
5 RenderBody {BODY} at (8,8) size 784x579
6 RenderBlock {PRE} at (0,0) size 784x13
7 RenderText {#text} at (0,0) size 102x13
8 text run at (0,0) width 102: "Some pre text"