
#bloc1, #bloc2{
position:relative;
width:600px;
height:150px;
background-color: blue;

}

#top_right{
position:absolute;
top:10px;
right:10px;
width:100px;
height:30px;
background-color: yellow;
padding:15px;
}
#bottom_left{
position:absolute;
bottom:10px;
left:10px;
width:100px;
height:30px;
background-color: yellow;
padding:15px;
}