1.css

body {
    background-color: #000000;
    margin-top: 80px;
    -moz-user-select: none;
    -khtml-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

@keyframes turning {
    0% {
        transform: rotate(-0.5deg);
    }
    25% {
        transform: rotate(0.5deg);
    }
    50% {
        transform: rotate(-0.5deg);
    }
    75% {
        transform: rotate(0.5deg);
    }
    100% {
        transform: rotate(-0.5deg);
    }
}

@keyframes border_color {
    0% {
        border-color: #921788
    }
    30% {
        border-color: #4682B4
    }
    60% {
        border-color: #32CD32
    }
    90% {
        border-color: #F4A460
    }
    100% {
        border-color: #FF0000
    }
}

@keyframes ball_fly {
    0% {
        transform: translate(0px,0px) rotate(0deg)
    }
    20% {
        transform: translate(-65px,-25px) rotate(60deg)
    }
    40% {
        transform: translate(-150px,-45px) rotate(120deg)
    }
    60% {
        transform: translate(-230px,-40px) rotate(180deg)
    }
    80% {
        transform: translate(-310px,-30px) rotate(240deg)
    }
    100% {
        transform: translate(-390px,0px) rotate(300deg)
    }
}

@keyframes size_circle {
    from {
        transform: scale(1, 1);
    }
    to {
        transform: scale(1.5, 1.5);
    }
}

.a1, .a2, .a3, .a4, .a5, .a6 {
    background-image: url(k/k3.png);
    color: #FFFFFF;
    margin-top: 30px;
    margin-left: auto;
    margin-right: auto;
    border: 3px solid #008B8B;
    border-radius: 20px;
    box-shadow: 3px 3px 5px #000000;
    height: 40px;
    width: 500px;
    text-align: center;
    font-size: 30px;
    font-weight: 900;
    font-family: Courier New;
    position: relative;
    transform: rotate(-1deg) scale(1);
    transition: 0.05s transform;
}

.a6 {
    animation: border_color 0.5s steps(1) 0.5s infinite alternate;
}

.a7 {
    color: #FFFFFF;
    margin-top: -600px;
    margin-left: auto;
    margin-right: auto;
    height: 40px;
    width: 300px;
    text-align: center;
    position: relative;
}

.a1:hover, .a2:hover, .a3:hover, .a4:hover, .a5:hover, .a6:hover {
    transform: rotate(0deg) scale(1);
    background-image: url(k/k4.png);
}

a:link {
    text-decoration: none;
}

a {
    display: block;
    color: #FFFFFF;
    height: 100%;
}

.k5, .k6 {
    width: 25px;
    height: 25px;
    position: absolute;
    top: 8px;
    left: 450px;
    z-index: -2;
}

.k5 {
    animation: size_circle 0.5s steps(2) 0s infinite alternate;
}

.k7 {
    position: absolute;
    height: 700px;
    width: 600px;
    top: 1px;
    left: -150px;
    z-index: -5;
}

.k8 {
    position: absolute;
    width: 35px;
    height: 35px;
    top: 660px;
    left: 365px;
    z-index: -4;
    animation: ball_fly 2.5s ease-out 0s infinite alternate;
}

.k8-1 {
    position: absolute;
    width: 115px;
    height: 50px;
    top: 642px;
    left: -100px;
    z-index: -3;

}

.k8-2 {
    position: absolute;
    width: 34px;
    height: 33px;
    top: 659px;
    left: 361px;
    z-index: -3;
}

.circle_V2 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-image: url(k/k3.png);
    z-index: 5;
    color: #000;
    position: absolute;
    top: 710px;
    left: -130px;
    line-height: 70px;
    font-size: 240%;
    border-width: 4px;
    border: 3px solid #008B8B;
}

.circle_V3 {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-image: url(k/k3.png);
    z-index: 5;
    color: #000;
    position: absolute;
    top: 710px;
    left: -30px;
    line-height: 70px;
    font-size: 240%;
    border-width: 4px;
    border: 3px solid #008B8B;
}