Getting web front-end to combat: pure css produced thunder and lightning weather icon

effect

FIG effect as

Realization of ideas

1. Using several box-shadow property write circle, these circle scattered together to form a pattern of clouds
2. after writing the following pseudo-element projector-style
3. before pseudo-element write yellow lightning style

dom structure

With two nested div container on it, the parent container to control the position of the icon display, sub-containers used to write the clouds style. The shadows and lightning style pseudo-elements are used on it, these are defined in the css.

<div class="container">
    <div class="stormy"></div>
</div>

css styles

Follow the steps implemented css

1, the first to write parent container style, the way to add the entire page background color, convenient preview

body{
    background: rgba(73,74,95,1);
}

.container{
    width: 170px;
    height: 170px;
    position: relative;
    margin: 250px auto;
}
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2, writing style clouds, clouds do not forget to have a vertical movement of animation

.stormy{
    width: 50px;
    height: 50px;
    position: absolute;
    left: 80px;
    top: 70px;
    margin-left: -60px;
    background: #222;
    border-radius: 50%;
    box-shadow: #222 64px -15px 0 -5px,
        #222 25px -25px,
        #222 30px 10px,
        #222 60px 15px 0 -10px,
        #222 85px 5px 0 -5px;
    animation: stormy 5s ease-in-out infinite;
}

@keyframes stormy{
    50%{
        transform: translateY(-20px);
    }
}

3, shadow style, also has animation

.stormy::after{
    content: '';
    width: 120px;
    height: 15px;
    position: absolute;
    left: 5px;
    bottom: -60px;
    background: #000;
    border-radius: 50%;
    opacity: 0.2;
    transform: scale(0.7);
    animation: stormy_shadow 5s ease-in-out infinite;
}

@keyframes stormy_shadow{
    50%{
        transform: translateY(20px) scale(1);
        opacity: 0.05;
    }
}

4, lightning style

.stormy::before{
    display: block;
    content: '';
    width: 0;
    height: 0;
    position: absolute;
    left: 57px;
    top: 70px;
    border-left:  0px solid transparent;
    border-right: 7px solid transparent;
    border-top: 43px solid yellow;
    box-shadow: yellow -7px -32px;
    transform:  rotate(14deg);
    transform-origin: 50% -60px;
    animation: stormy_thunder 2s steps(1, end) infinite;
}

@keyframes stormy_thunder{
    0%{
        transform: rotate(20deg);
        opacity: 1;
    }
    5%{
        transform: rotate(-34deg);
        opacity: 1;
    }
    10%{
        transform: rotate(0deg);
        opacity: 1;
    }
    15%{
        transform: rotate(-34deg);
        opacity: 0;
    }
}

OK, done. Pressing steps, you can achieve cool slightly thunder weather icon on your page -