/* Ship: bottom to top */
.ship {
    animation: sailUp 6s ease-in-out infinite;
}

@keyframes sailUp {
    0% {
        transform: translateX(0);
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {

        transform: translateX(400px);
        opacity: 1;
    }
}