We will position the elements with rules like this:
#first { position: absolute; top: 100px; left: 100px; z-index: 1; color: yellow } #second { position: absolute; top: 103px; left: 103px; z-index: 2; color: lime }
We will position four P elements named first, second, third, and fourth. Each will be three pixels to the right and below (and in front of) the previous one and will be displayed in a different color.
Below them, we will position four rectangles (colored elements whose text is spaces only) in the same way.