CSSでクリスマスリースを作成してみた！！

<!-- リース -->
<div class="wreath"></div>

/* リースの外側 */
.wreath {
    background-color: var(--wreath-color);
    height: 100%;
    width: 100%;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* リースの内側 */
.wreath::after {
    content: "";
    background-color: var(--background-color);
    height: 50%;
    width: 50%;
    border-radius: 50%;
}

<!-- ベル -->
<div class="bell">
    <!-- ベルの本体 -->
    <div class="bell-casting">
        <div class="bell-casting-item bell-casting-t"></div>
        <div class="bell-casting-item bell-casting-l"></div>
        <div class="bell-casting-item bell-casting-r"></div>
        <div class="bell-casting-item bell-casting-b"></div>
    </div>

    <!-- ベルのクラッパー -->
    <div class="bell-clapper">
        <div class="bell-clapper-item"></div>
    </div>
</div>

/* 部品1 */
.bell-casting-t {
    width: 70px;
    height: 30px;
    border-radius: 50% / 100% 100% 0% 0%;
}

/* 部品2、部品3 */
.bell-casting-l,
.bell-casting-r {
    position: relative;
    width: 35px;
    height: 60px;
    --bell-side-width: 15px;
}

.bell-casting-l::before,
.bell-casting-r::before {
    position: absolute;
    content: "";
    background-color: var(--bell-color);
    height: 30px;
    width: var(--bell-side-width);
    bottom: 0;
}

.bell-casting-l::before {
    left: calc(var(--bell-side-width) * -1);
}

.bell-casting-r::before {
    right: calc(var(--bell-side-width) * -1);
}

.bell-casting-l::after,
.bell-casting-r::after {
    position: absolute;
    content: "";
    background-color: var(--wreath-color);
    height: 30px;
    width: var(--bell-side-width);
    bottom: 0;
}

.bell-casting-l::after {
    border-radius: 0% 0% 100%;
    left: calc(var(--bell-side-width) * -1);
}

.bell-casting-r::after {
    border-radius: 0% 0% 0% 100%;
    right: calc(var(--bell-side-width) * -1);
}

/* 部品4 */
.bell-casting-b {
    width: 100%;
    height: 10px;
    border-radius: 50% / 0 0 100% 100%;
}

/* 部品5 */
.bell-clapper {
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
}

.bell-clapper-item {
    width: 30px;
    height: 110px;
    background-color: #aaaa55;
    border-radius: 0% 0% 50% 50%;

    animation-name: shake-bell-clapper;
    animation-duration: 3s;
    animation-iteration-count: infinite;
    transform-origin: left top;
    transform-origin: 50% 0;
}

@keyframes shake-bell-clapper {
    0% {
        transform: rotate(10deg);
    }

    50% {
        transform: rotate(-10deg);
    }

    100% {
        transform: rotate(10deg);
    }
}