/* changing background */

@-webkit-keyframes cf4FadeInOut {
    0% {
        opacity:1;
    }
    17% {
        opacity:1;
    }
    25% {
        opacity:0;
    }
    92% {
        opacity:0;
    }
    100% {
        opacity:1;
    }
}

@-moz-keyframes cf4FadeInOut {
    0% {
        opacity:1;
    }
    17% {
        opacity:1;
    }
    25% {
        opacity:0;
    }
    92% {
        opacity:0;
    }
    100% {
        opacity:1;
    }
}

@-o-keyframes cf4FadeInOut {
    0% {
        opacity:1;
    }
    17% {
        opacity:1;
    }
    25% {
        opacity:0;
    }
    92% {
        opacity:0;
    }
    100% {
        opacity:1;
    }
}

@keyframes cf4FadeInOut {
    0% {
        opacity:1;
    }
    17% {
        opacity:1;
    }
    25% {
        opacity:0;
    }
    92% {
        opacity:0;
    }
    100% {
        opacity:1;
    }
}


#cf4a div {
    -webkit-animation-name: cf4FadeInOut;
    -webkit-animation-timing-function: ease-in-out;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-duration: 40s;

    -moz-animation-name: cf4FadeInOut;
    -moz-animation-timing-function: ease-in-out;
    -moz-animation-iteration-count: infinite;
    -moz-animation-duration: 40s;

    -o-animation-name: cf4FadeInOut;
    -o-animation-timing-function: ease-in-out;
    -o-animation-iteration-count: infinite;
    -o-animation-duration: 40s;

    animation-name: cf4FadeInOut;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
    animation-duration: 40s;
}
#cf4a div:nth-of-type(1) {
    -webkit-animation-delay: 30s;
    -moz-animation-delay: 30s;
    -o-animation-delay: 30s;
    animation-delay: 30s;
}
#cf4a div:nth-of-type(2) {
    -webkit-animation-delay: 20s;
    -moz-animation-delay: 20s;
    -o-animation-delay: 20s;
    animation-delay: 20s;
}
#cf4a div:nth-of-type(3) {
    -webkit-animation-delay: 10s;
    -moz-animation-delay: 10s;
    -o-animation-delay: 10s;
    animation-delay: 10s;
}
#cf4a div:nth-of-type(4) {
    -webkit-animation-delay: 0s;
    -moz-animation-delay: 0s;
    -o-animation-delay: 0s;
    animation-delay: 0s;
}