#square {
width: 100px;
height: 100px;
background: #555;
}

#circle {
width: 100px;
height: 100px;
background: #555;
-moz-border-radius: 50px;
-webkit-border-radius: 50px;
-o-border-radius: 50px;
border-radius: 50px;
}

#oval {
width: 200px;
height: 100px;
background: #555;
-moz-border-radius: 100px / 50px;
-webkit-border-radius: 100px / 50px;
border-radius: 100px / 50px;
}

#heart {
position: relative;
width: 100px;
height: 90px;
}
#heart:before, #heart:after {
position: absolute;
content: "";
left: 50px;
top: 0;
width: 50px;
height: 80px;
background: #666;
-moz-border-radius: 50px 50px 0 0;
border-radius: 50px 50px 0 0;
-webkit-transform: rotate(-45deg);
-moz-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
-o-transform: rotate(-45deg);
transform: rotate(-45deg);
-webkit-transform-origin: 0 100%;
-moz-transform-origin: 0 100%;
-ms-transform-origin: 0 100%;
-o-transform-origin: 0 100%;
transform-origin: 0 100%;
} #heart:after {
left: 0;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
transform: rotate(45deg);
-webkit-transform-origin: 100% 100%;
-moz-transform-origin: 100% 100%;
-ms-transform-origin: 100% 100%;
-o-transform-origin: 100% 100%;
transform-origin :100% 100%;
}

#talkbubble {
width: 120px;
height: 80px;
background: #666;
position: relative;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
}
#talkbubble:before {
content:"";
position: absolute;
right: 100%;
top: 26px;
width: 0;
height: 0;
border-top: 13px solid transparent;
border-right: 26px solid #666;
border-bottom: 13px solid transparent;
}

.triangle{
width:0;
height:0;
border-bottom:100px solid red;
border-left:50px solid transparent;
border-right:50px solid transparent;
}