body,div,p{
  margin: 0px;
}
p{
  text-align: justify;
}
.carre{
  width: 75px;
  height: 75px;
  border: 1px solid black;
}
.bleu{
  background-color: #0AF;
}
.vert{
  background-color: #0FA;
}
.fixed{
  position: fixed;
}
.droite{
  right: 0px;
}