#col_1 {
position: absolute;
left: 4%;
width: 20%;
top: 30px;
background-color: #ffffff;
}

#col_2 {
position: absolute;
left: 28%;
width: 20%;
top: 30px;
background-color: #ffffff;
}

#col_3 {
position: absolute;
left: 52%;
width: 20%;
top: 30px;
background-color: #ffffff;
}

#col_4 {
position: absolute;
left: 76%;
width: 20%;
top: 30px;
background-color: #ffffff;
}