p {position:absolute}
p.p1 {left:0pt;   top:100pt; background-color:white}
p.p2 {left:300pt; top:100pt; background-color:pink}
p.p3 {left:300pt; top:0pt;   background-color:yellow}
p.p4 {left:0pt;   top:0pt;   background-color:lightgrey}
p.p5 {left:150pt; top:50pt;  background-color:cyan}
p.p6 {left:150pt; top:150pt; background-color:lime}