.icn-discipline-2 {
    background-image: url('http://www.cubancouncil.com/uploads/services/btn_backend.gif');
}

.icn-discipline-3 {
    background-image: url('http://www.cubancouncil.com/uploads/services/btn_concept.gif');
}

.icn-discipline-4 {
    background-image: url('http://www.cubancouncil.com/uploads/services/btn_design.gif');
}

.icn-discipline-1 {
    background-image: url('http://www.cubancouncil.com/uploads/services/btn_frontend.gif');
}

.icn-discipline-5 {
    background-image: url('http://www.cubancouncil.com/uploads/services/btn_ia.gif');
}

.icn-discipline-6 {
    background-image: url('http://www.cubancouncil.com/uploads/services/btn_id.gif');
}