body, p{
  margin: 0px;
}
div{
  background-color: #0AE;/*Bleu*/
  margin: 20px 0px;
}
p{
  background-color: #0EA;/*Vert*/
}
.p1{
  margin-top: 20px;
}
.p2{
  margin-bottom: 40px;
}
.bordure{
  border: 2px solid black;
}