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HTML

              
                <h1 id="title">Happy New Year!</h1>
<div class="stars"></div>
<svg class="mountains mountains--layer1" xmlns="http://www.w3.org/2000/svg" width="1920" height="200" viewBox="0 0 1920 200" preserveAspectRatio="none">
  <title>bergskedja</title>
  <path d="M0,41.57s21.25,2.19,27.33,2.19,22.27-4.37,28.34,0-1,22.94,6.07,19.67S72.87,52,81,52.81s16.19,10.15,22.27,0,25.3-1.41,30.36,6.24,21.25,7.33,26.32,4.76,8.1-20.66,16.19-22,17.21-6.31,18.22,0,5.06,3,12.15,3,20.24-10.93,25.3-14.2S238.86,11,259.1,11s35.42,4.37,43.52,0S316.79.05,321.86.05,337-1,337,6.61s6.07,24.92,15.18,26.12,30.36,11,34.41,14.31,18.22-2.19,18.22-2.19c11.13,7.65,20.24,0,20.24,0S441.29,23,453.43,18.63s17.21,4.37,20.24,7.65S497,32.62,500,32.73s19.23-10.82,23.28-10.82,27.33-4.37,34.41-3.28,16.19,10.72,16.19,14.1S582,52.5,586,52.5s15.18,2.19,21.25,2.19,14.17,1.09,17.21,1.09,6.07-3.28,26.32-13.11S669,21.91,677.11,24.09s9.11,14.2,16.19,13.11,0-17.48,24.29-17.48a140.45,140.45,0,0,1,44.53,7.65s3,29.5,17.21,29.5c0,0,28.34-7.65,36.44-7.65s39.47,7.33,47.57,16.23,32.39,12.18,42.51,12.18,25.3,15.3,28.34,15.3,23.28,3.28,28.34-5.46S967.59,66.7,975.69,58s10.12-21.3,17.21-11.2,13.16,8.47,16.19,0,14.17-16.12,17.21-16.12,19.23,3.28,19.23,6.56,25.3-2.19,35.42-12,39.47-9.83,65.79-9.83,54.65,9.83,61.74,14.2,33.4,7.65,42.51,7.65,20.24,4.37,26.32,4.37,5.06,9.83,17.21,13.11,25.3-8.19,28.34-7.92,10.12-16.12,19.23-16.12,27.33,16.94,34.41,16.12,22.27,22.12,28.34,24.31,2,12.13,18.22,22.45,22.27,32.18,34.41,32.18,50.61-8.74,54.65-15.3,22.27-19.67,27.33-19.67,34.41-7.65,38.46-4.37,29.35,22.94,48.58,22.94,46.56-14.2,54.65-14.2,23.28-9.83,35.42-9.83,46.56,12,57.69,14.2,42.51,8.74,58.7,8.74,38.67-42.77,66.8-45.89c6.12-.68,20.24,1.09,20.24,1.09V200H0Z"/>
</svg>

<svg class="mountains mountains--layer2" xmlns="http://www.w3.org/2000/svg" width="1920" height="200" viewBox="0 0 1920 200" preserveAspectRatio="none">
    <title>bergskedja2</title>
    <path d="M0,82.09s21.14-13,30.14-19,24-16,45-17.5,49.5-23.86,63-17c0,0,62.87.71,70.5,6.67s81,40.83,127.49,40.83,88.5-20.16,126-24.33,68.23-29.63,90-24.33,31.5,3.89,46.5-.72,25.5-19.61,42-19.61,25.5-7.1,51-7.1,39,11.59,63,11.59,60-3,75,3S864.1,4,882.09,4,934.41,22.09,960,17.59s58.59-7.5,75.09-4.5,36,16.9,61.5,25,82.5,17,97.5,18.55,51.77-6,67.5-10.5S1313,30,1330.81,38s23.76,44,44.76,44,45-6,57-12,31.5-22.5,45-22.5,12,7.5,31.5,7.5,42-4.5,57-4.5,24-25.5,49.5-22.5,66,1.9,90,13,49.5,30.55,78,33.55,54-16.5,69-12,44.91,19.5,67.45,19.5V200H0Z"/>
</svg>


              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Caveat');

html, body {
    //background: linear-gradient(to bottom, rgba(24,26,43,1) 0%, rgba(57,71,105,1) 73%, rgba(106,96,120,1) 100%);
    background: linear-gradient(to bottom, rgba(9,5,19,1) 0%, rgba(150,73,135,1) 75%, rgba(253,188,163,1) 100%);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.stars {    
    position: absolute;
    top: 0; right: 0; bottom: 0; left: 0;
    &:after, &:before {
        content: "";
        display: block;
        position: absolute;
        top: 0; left: 0; bottom: 0; right: 0;
        background: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAGQAQMAAAC6caSPAAAABlBMVEVHcEz///+flKJDAAAAAXRSTlMAQObYZgAAAIVJREFUeAHt2SEOwkAQhtFJKuqKRRGOgKzgUMgKRI/G0ZDoacNkN/ue/zJ+/ugBcI+01/EEAGBc04FkP58AVFoi7VaSLAEAAPB/j0hbK678AADMkXbZG03mGA0AAKsP3JgAAGDa88knsuZ8Mp1M6gEAPFtNrtEjtkh7lyRb3/PAWpS0BPgC0PMMdOEjXqoAAAAASUVORK5CYII=');
    }
    &:after {
        background-size: 100px;
        opacity: 0.4;
    }
    &:before {
        background-size: 200px;
        opacity: 0.6;
    }
    animation: rotation 360s infinite linear;
}

@keyframes rotation {
    0% { transform: rotate(0) }
    100% { transform: rotate(360deg) }
}


h1 {
    font-size: calc(1.5em + 5vw);
    color: #fff;
    font-family: 'Caveat', sans-serif;
    text-align: center;
    padding: 0.5em;
    transform: rotate(-4deg) translateY(-15vh);
}

.mountains {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    width: auto;
    min-width: 100%;
    height: 60px;
    fill: #000022;
}
.mountains--layer1 {
    z-index: 2;
}
.mountains--layer2 {
    fill: #9D5189;
    z-index: 0;
}
              
            
!

JS

              
                // Create the bursts
const B_CHILD = {
    fill:           { '#ffffff' : '#ef1cec' },
    delay:         'rand(300, 359)',
    duration:       700,
    pathScale:     'rand(0.8, 1)',
    isSwirl:        true,
    swirlSize:     'stagger(-2,2)',
    swirlFrequency: 1,
}
const B_OPTS = {
    count:  'rand(15,20)',
    top:    '100%',
    children: {
        ...B_CHILD
    }
}
const burst1 = new mojs.Burst({
    ...B_OPTS,
    radius: { 0: 'rand(150,170)' },
    x:      -45,
    y:      -335
});

const burst1_2 = new mojs.Burst({
    ...B_OPTS,
    radius: { 0: 'rand(150,170)' },
    x:      -45,
    y:      -335,
    children: {
        ...B_CHILD,
        delay:      'rand(260, 350)',
        pathScale:  'rand(0.7, 0.8)',
        degreeShift: 20,
    }
});


const burst2 = new mojs.Burst({
    ...B_OPTS,
    radius: { 0: 'rand(100,150)' },
    x:      140,
    y:      -315,
    children: {
        ...B_CHILD,
        fill:  { '#ffffff' : '#d8ff00' }
    }
});

const burst2_2 = new mojs.Burst({
    ...B_OPTS,
    radius: { 0: 'rand(100,150)' },
    x:      140,
    y:      -315,
    children: {
        ...B_CHILD,
        fill:       { '#ffffff' : '#d8ff00' },
        delay:      'rand(260, 350)',
        pathScale:  'rand(0.7, 0.8)',
        degreeShift: 20,
    }
});

// Create interactive burst
const burst_tune = new mojs.Burst({
    ...B_OPTS,
    radius: { 0: 'rand(100,150)' },
    left:   0, 
    top:    0,
    x:      0,
    y:      0,
    children: {
        ...B_CHILD,
        delay:   'rand(0, 50)',
        fill:  { '#ffffff' : '#d8ff00' }
    }
});
const burst_tune_2 = new mojs.Burst({
    ...B_OPTS,
    radius: { 0: 'rand(100,150)' },
    left:   0, 
    top:    0,
    children: {
        ...B_CHILD,
        fill:       { '#ffffff' : '#d8ff00' },
        delay:      'rand(10, 150)',
        pathScale:  'rand(0.7, 0.8)',
        degreeShift: 20,
    }
});
document.addEventListener( 'click', function (e) {
    burst_tune
        .generate()
        .tune({ x: e.pageX, y: e.pageY })
        .replay();
    burst_tune_2
        .generate()
        .tune({ x: e.pageX, y: e.pageY })
        .replay();
});

// Create the firework lines
const FW_OPTS = {
    shape:           'curve',
    fill:            'none',
    isShowStart:      false,
    strokeWidth:      {3 : 0},
    stroke:          '#ffffff',
    strokeDasharray: '100%',
    strokeDashoffset: { '-100%' : '100%' },
    duration:         1000
}
const fw1 = new mojs.Shape({
    ...FW_OPTS,
    radius:     170,
    radiusY:    20,
    top:       '100%',
    y:          -165,
    angle:      75,
    onStart: function(){
        burst1.replay(0);
        burst1_2.replay(0);
    }
});


const fw2 = new mojs.Shape({
    ...FW_OPTS,
    radius:           180,
    radiusY:          50,
    top:             '100%',
    x:                50,
    y:                -155,
    strokeDashoffset: { '100%' : '-100%' },
    angle:            -60,
    delay:            200,
    onStart: function(){
        burst2.replay(0);
        burst2_2.replay(0);
    }
});

// Underline under title
const underline = new mojs.Shape({
    parent:           document.getElementById('title'),
    shape:           'curve',
    strokeLinecap:   'round',
    fill:            'none',
    isShowStart:      false,
    strokeWidth:      {'1em' : '5em'},
    stroke:          '#ffffff',
    strokeDasharray: '200%',
    strokeDashoffset: { '200%' : '100%' },
    radius:           150,
    radiusY:          10,
    y:               '1.1em',
    angle:            -10,
    duration:         2000,
    delay:            1000
}).then({
    strokeWidth:      {'5em' : '1em'},
    strokeDashoffset: { '100%' : '-200%' },
    duration:         2000,
    delay:            10000
});
const timelineText = new mojs.Timeline({
    repeat: 2018
})
.add(underline)
.play();

// Fire off the explosions
const timeline = new mojs.Timeline({
    repeat: 2018
})
.add([fw1, fw2])
.play();

// Create sounds
// var explosion = new Audio("https://www.freesound.org/data/previews/21/21410_21830-lq.mp3"); // buffers automatically when created
// explosion.play();
              
            
!
999px

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