#bloc1_de_body{
height:20px;
width:100px;
background-color: red;
padding-left:30px;
}
#bloc2_de_body{
height:40px;
width:200px;
background-color: yellow;
padding:10px;
}
#bloc3_de_body{
width:600px;
background-color: blue;
padding-left:10px;
padding-right:20px;
padding-bottom:50px;
}
#bloc_a_de_bloc3{
height:30px;
background-color:gray;
}

#bloc_b_de_bloc3{
background-color:green;
width:350px;
padding: 20px 0px 40px 8px;
}

#bloc4_de_body{
height:50px;
width:150px;
background-color: red;
}
