left

* {
 margin: 0;
 padding: 0;
}

.main {
 height: 200px;
 width: 950px;
 position: absolute;
 top: 50%;
 left: 50%;
 margin-top: -100px;
 margin-left: -475px;
}

.wrapper {
 width: 198px;
 height: 198px;
 float: left;
 border: 1px solid #808080;
}

.empty {
 width: 50px;
 height: 200px;
 float: left;
}

.a, #div1, .b, .c, .d, .e {
 width: 50px;
 height: 50px;
 background-color: #7092BE;
}

.a {
 position: relative;
 left: auto;
}

#div1 {
 position: relative;
}

.c {
 position: relative;
 left: 50%;
}

.d {
 position: fixed;
 left: 10px;
}

.e {
 position: absolute;
 left: 100px;
}