.terminal-cursor {
    font-weight: 100;
    -webkit-animation: blink 0.7s infinite;
    -moz-animation: blink 0.7s infinite;
    -ms-animation: blink 0.7s infinite;
    -o-animation: blink 0.7s infinite;
    animation: blink 0.7s infinite;
}

@keyframes blink {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}