grass.css

@-webkit-keyframes animateGrass {
    0% {
        transform: scale(0.45) skew(-3deg);
    }
    25% {
        transform: scale(0.45) skew(0deg);
    }
    50% {
        transform: scale(0.45) skew(3deg);
    }
    75% {
        transform: scale(0.45) skew(0deg);
    }
    100% {
        transform: scale(0.45) skew(-3deg);
    }
}

.grassClosePlane {
    animation: animateGrass 7s linear infinite;
}

#grass4a {
    filter: contrast(88%) brightness(217%) blur(0.125rem);
    margin-left: 255%;
    margin-top: 102%;
}

#grass4b {
    filter: contrast(88%) brightness(227%) blur(0.125rem);
    margin-left: 215%;
    margin-top: 102%;
}

#grass4c {
    filter: contrast(88%) brightness(217%) blur(0.125rem);
    margin-left: 175%;
    margin-top: 102%;
}

#grass4d {
    filter: contrast(88%) brightness(227%) blur(0.125rem);
    margin-left: 135%;
    margin-top: 102%;
}