Betterselect style example

.checkbox-depth-0{
background-color: #C0C0C0;
padding-left:0px;
}
.checkbox-depth-1{
background-color: #C8C8C8;
padding-left:15px;
}
.checkbox-depth-2{
background-color: #D0D0D0;
padding-left:30px;
}
.checkbox-depth-3{
background-color: #D8D8D8;
padding-left:45px;
}
.checkbox-depth-4{
background-color: #E0E0E0;
padding-left:60px;
}
.checkbox-depth-5{
background-color: #E8E8E8;
padding-left:75px;
}
.checkbox-depth-6{
background-color: #F0F0F0;
padding-left:90px;
}
.checkbox-depth-7{
background-color: #F8F8F8;
padding-left:105px;
}
.checkbox-depth-8{
background-color: #FFFFFF;
padding-left:120px;
}