#slider li:nth-child(1){
    background: url("digital-brain-tablet.png");
    background-size: 100% 100%;
}
#slider li:nth-child(2){
    background: url("digital-brainsss.png");
    background-size: 100% 100%;
}
#slider li:nth-child(3){
    background: url("fish.png");
    background-size: 100% 100%;
}
#slider li:nth-child(4){
    background: url("digital-goldfishy.png");
    background-size: 100% 100%;
}
#slider li:nth-child(5){
    background: url("digital-couple.png");
    background-size: 100% 100%;
}
#slider li:nth-child(6){
    background: url("digital-praxbind.png");
    background-size: 100% 100%;
}
#slider li:nth-child(7){
    background: url("digital-whatsimportant.png");
    background-size: 100% 100%;
}
#slider li:nth-child(8){
    background: url("digital-rockhair.png");
    background-size: 100% 100%;
}
#slider li:nth-child(9){
    background: url("digital-redball.png");
    background-size: 100% 100%;
}
#slider li:nth-child(10){
    background: url("digital-tablet-redball.png");
    background-size: 100% 100%;
}
#slider li:nth-child(11){
    background: url("museum.png");
    background-size: 100% 100%;
}
#slider li:nth-child(12){
    background: url("digital-botox.png");
    background-size: 100% 100%;
}
#slider li:nth-child(13){
    background: url("digital-botox-phones.png");
    background-size: 100% 100%;
}
#slider li:nth-child(14){
    background: url("goose.png");
    background-size: 100% 100%;
}