CSS 애니메이션에서 사인 및 코사인 곡선을 시뮬레이션하는 예 공유

<div id="container">
      <div class="demobox">
           <div class="demo"></div>
      </div>
      <div class="demobox">
            <div class="demo"></div>
      </div>
</div>

#container {
    height:110px;
    font-size:0;
    width:140px;
}
.demobox {
    float:right;
    width:5px;
    height:5px;
    animation:myfirst1 linear 5s infinite;
    -webkit-animation:myfirst1 linear 5s infinite; 
}
.demo {
    width:6px;
    height:6px;
    border-radius:3px;
    background:#90e4e9;
    animation:myfirst2 ease-in-out 1s infinite alternate;
    -webkit-animation:myfirst2 ease-in-out 1s infinite alternate;  /*Safari and Chrome */
}

.demobox:nth-of-type(1) .demo:nth-of-type(1){
    animation-delay:0s;
}
.demobox:nth-of-type(2) .demo:nth-of-type(1){
   animation-delay:0.03s;
}

@keyframes myfirst1
{
    from {
        transform:translateX(0px);
        -webkit-transform:translateX(0px);
    }
    to {
        transform:translateX(1000px);
        -webkit-transform:translateX(1000px);
    }
    
}

@-webkit-keyframes myfirst1 /* Safari and Chrome */
{
    from {
        transform:translateX(0px);
        -webkit-transform:translateX(0px);
    }
    to {
        transform:translateX(1000px);
        -webkit-transform:translateX(1000px);
    }
}
@keyframes myfirst2
{
    0% {
        transform:translateY(0px);
        -webkit-transform:translateY(0px);
    }
    50% {
        transform:translateY(100px);
        -webkit-transform:translateY(100px);
    }
    100% {
        transform:translateY(0px);
        -webkit-transform:translateY(0px);
    }
}

@-webkit-keyframes myfirst2 /* Safari and Chrome */
{
    0% {
        transform:translateY(0px);
        -webkit-transform:translateY(0px);
    }
    50% {
        transform:translateY(100px);
        -webkit-transform:translateY(100px);
    }
    100% {
        transform:translateY(0px);
        -webkit-transform:translateY(0px);
    }
}