.sky {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.star-blink {
    position: absolute;
    width: 7px;
    height: 7px;
    background-color: #b6cbd4;
    border-radius: 50%;
    z-index: 0;
    -webkit-transform: rotate(0deg) scale(0.08);
    -webkit-backface-visibility: hidden;
    -webkit-animation: blinkAfter 15s infinite ease-out;
}

.star-blink div {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    -webkit-transform: rotate(45deg) scale(0.75);
    background-image: linear-gradient(1deg, #f35d44, #f35c44 51%, #dd0f3a);
    box-shadow: 0 0 2px 8px rgba(221, 15, 58, 0.4), 0 0 2px 9px rgba(255, 255, 255, 0.07), 0 0 2px 15px rgba(243, 93, 68, 0.4), 0 0 2px 16px rgba(255, 255, 255, 0.1);
    -webkit-backface-visibility: hidden;
}

.star-blink:after,
.star-blink:before,
.star-blink div:after,
.star-blink div:before {
    content: '';
    position: absolute;
    display: block;
    top: -350%;
    left: 45%;
    height: 800%;
    width: 10%;
    border-radius: 50%;
    background-color: #b6cbd4;
    background: -webkit-linear-gradient( top, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.7) 50%, rgba(255, 255, 255, 0.1) 100%);
    z-index: 1;
    box-shadow: 0 0 25px white;
    -webkit-backface-visibility: hidden;
}

.star-blink:before,
.star-blink div:before {
    -webkit-transform: rotate(90deg);
}

@-webkit-keyframes blinkAfter {
    0% {
        -webkit-transform: rotate(0deg) scale(0.08);
    }
    4% {
        -webkit-transform: rotate(-20deg) scale(0.9);
    }
    8% {
        -webkit-transform: rotate(-40deg) scale(0.08);
    }
    50% {
        -webkit-transform: rotate(-40deg) scale(0.08);
    }
    52% {
        -webkit-transform: rotate(-50deg) scale(0.3);
    }
    54% {
        -webkit-transform: rotate(-60deg) scale(0.08);
    }
    100% {
        -webkit-transform: rotate(0deg) scale(0.08);
    }
}