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 784x584
6 RenderText {#text} at (0,0) size 196x18
7 text run at (0,0) width 196: "red squares background image."