#bizeau {
    background: none repeat scroll 0% 0% #ccc0;
    border-color: #9969F1 #00A9FF #00A9FF #9969F1;
    border-style: solid;
    border-width: 30px;
    height: 100%;
    width: 100%;
    /* margin-top: -60px; */
    padding: 20px;
}

#bizeau2 {
    display: block;
    position: relative;
    width: 100%;
    height: 100%;
    background: #aaa0;
    margin: 0 auto;
    padding: 0;
}

#bizeau2:before {
    content: "";
    position: absolute;
    right: 0px;
    border-color: #FFF #7531EC #FFDA00 #FFF;
    border-style: solid;
    border-width: 0px 30px 30px 0px;
    height: 0px;
    width: 0px;
    display: block;
}