e<div class="anim-container">
        <div class="shutter top">
            <div class="circle">
                <div class="box" style="--rotateVal: 0deg"></div>
                <div class="box" style="--rotateVal: 90deg"></div>
                <div class="box" style="--rotateVal: 180deg"></div>
                <div class="box" style="--rotateVal: 270deg"></div>
            </div>
            <div class="circle">
                <div class="box" style="--rotateVal: 0deg"></div>
                <div class="box" style="--rotateVal: 90deg"></div>
                <div class="box" style="--rotateVal: 180deg"></div>
                <div class="box" style="--rotateVal: 270deg"></div>
            </div>
        </div>
        <div class="shutter bottom"></div>
    </div>

    <!-- content -->

    <div class="header">
        <div class="left">
            <div class="content">
                <h1 class="heading"><span>amazing</span> web animation</h1>
                <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quibusdam porro corporis quod aliquid harum praesentium eius rerum commodi expedita. Eos?</p>
                <button class="btn">explore</button>
            </div>
        </div>
        <div class="right">
            <p>01</p>
        </div>
    </div>

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root{
    --rotateVal: 0deg;
}

body{
    width: 100%;
    height: 100vh;
    position: relative;
    background: #111;
    font-family: 'roboto', sans-serif;
}

.anim-container{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 9;
    pointer-events: none;
}

.shutter{
    position: relative;
    width: 100%;
    height: 50%;
    background: #000;
}

.shutter.top{
    top: 0;
    z-index: 2;
    animation: slide-top 1s 3.5s forwards 1;
}

.shutter.top::before{
    content: '';
    position: absolute;
    width: 100%;
    height: 3px;
    background: #fff;
    bottom: 0;
    left: -100%;
    animation: slide-left 1s 2.5s forwards 1;
}

.shutter.bottom{
    bottom: 0;
    animation: slide-bottom 1s 3.5s forwards 1;
}

.circle{
    position: absolute;
    left: 50%;
    bottom: -100px;
    transform: translateX(-50%) rotate(-90deg);
    width: 200px;
    height: 200px;
    overflow: hidden;
    border-radius: 50%;
    animation: rotate 1s 1.25s forwards 1;
}

.circle:nth-child(2){
    width: 150px;
    height: 150px;
    bottom: -75px;
    animation: rotate 1s 1.25s forwards reverse 1, bg .5s 2.25s forwards 1;
}

.circle::before{
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 95%;
    height: 95%;
    border-radius: 50%;
    background-color: #000;
    z-index: 2;
}

.circle:nth-child(2)::before{
    animation: bg .5s 2.25s forwards 1;
}

.box{
    position: absolute;
    top: 50%;
    left: 50%;
    transform-origin: 0 0 ;
    width: 200px;
    height: 200px;
    background: #fff;
    transform: rotate(0deg) skew(90deg);
    animation: drawCircle .5s forwards 1;
}

.circle:nth-child(2) .box{
    animation: drawCircle .5s .75s forwards 1;
}

@keyframes drawCircle{
    0%{
        transform: rotate(var(--rotateVal)) skewX(90deg);
    }
    100%{
        transform: rotate(var(--rotateVal)) skewX(10deg);
    }
}

@keyframes rotate{
    100%{
        transform: translateX(-50%) rotate(-270deg);
    }
}

@keyframes bg{
    100%{
        background: #fff;
    }
}

@keyframes slide-left{
    100%{
        left: 100%;
    }
}

@keyframes slide-top{
    100%{
        top: -100%;
    }
}

@keyframes slide-bottom{
    100%{
        bottom: -100%;
    }
}

.header{
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.left{
    width: 60%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.content{
    width: 80%;
    min-width: 500px;
}

.heading{
    font-size: 80px;
    text-transform: capitalize;
}

.heading span{
    font-size: 120px;
    display: block;
}

.content p{
    margin: 50px 0;
    width: 90%;
}

.btn{
    padding: 10px 40px;
    border: none;
    border-radius: 50px;
    background: #000;
    color: #fff;
    font-size: 15px;
    cursor: pointer;
    text-transform: capitalize;
}

.right{
    width: 40%;
    height: 100%;
    background: url(https://raw.githubusercontent.com/kunaal438/web-ux/master/bg.png);
    background-size: cover;
    position: relative;
}

.right p{
    position: absolute;
    bottom: 20px;
    right: 20px;
    color: #fff;
    font-size: 60px;
    padding: 10px;
    width: 100px;
    border: 5px solid #fff;
    background: rgba(0, 0, 0, 0.5);
}

@media (max-width: 996px){
    .header{
        flex-direction: column-reverse;
    }
    .left, .right{
        width: 100%;
    }
    .right{
        height: 300px;
        background-position: bottom center;
    }
    .heading, .heading span{
        font-size: 7vw;
    }
    .content{
        min-width: 70%;
    }
    .content p{
        width: 100%;
    }
}

@media (max-width: 500px){
    .haeding, .heading span{
        font-size: 60px;
    }
}