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HTML

              
                <input id="trigger" class="toggle-checkbox" type="checkbox"><label for="trigger">Action!</label>

<div class="spotlights">
<div id="1" class="spotlight"></div>
<div id="2" class="spotlight"></div>
<div id="3" class="spotlight"></div>
<div id="4" class="spotlight"></div>
</div>
<div class="z">
    <svg class="music" fill-rule="evenodd" stroke-linejoin="round" stroke-miterlimit="2" clip-rule="evenodd" viewBox="0 -100 244 396">
      <g transform="matrix(1.32759 0 0 1.27943 -5843 -177)">
        <g id="n3" class="musicnote"><path fill="#2f2f2f" fill-rule="nonzero" d="M202 103l4-23 2 1 3 1v1h1v1h1l5 1 1 1v1h1v2h1v1l1 1h1v2l-1-1v1h-4v-1h-2v-1h-4v1l-4-1v-1h-2l-3 19h-1l-1 2h-1v1h-1v1l-2-1v1h-3v-1l-2-1v-1h-1v-1h-1v-1h6v-1h2v-1h3v-1h-5v1h-1v-1l-2 1v-1l-2 1h-1v-2h1l1-2h1v-1h1v-1l2 1v-1h3v1l2 1v1h1z" transform="matrix(.75325 0 0 .7816 4397 135)"/></g>
        <g id="n6" class="musicnote"><path fill="#2f2f2f" fill-rule="nonzero" d="M18 28l2-23h3v1h2v1h2l-1 1h6v1h2l-1 2h2v2h1v1h1v1h1v1h-2l-1 1h-2v-1h-1v-1h-3v1l-2-1v1h-4l1-1h-2l-3 19h-1v2h-1v1h-1v1h-2l-1 1-3-1 1-1H8l1-1H8v-1H7v-1h2v-1h5v-1h1v-1h2v-1h-3v1H7l-1 1v-2h1l1-2h1v-1h1v-1h2v-1h3v1l2 1v1h1z" transform="matrix(.75325 0 0 .7816 4397 135)"/></g>
        <g id="n4" class="musicnote"><path fill="#2f2f2f" fill-rule="nonzero" d="M29 62l1-7h2l-1 13h-1l-1 2h-1v1h-1v1h-2v1h-3v-1h-2v-1l-1-1v-1h-1v-2h-1l1-3h1v-2h1v-1h1v-1h2v-1l3 1v1h2v1h1zm2-13l-1 6h-2l2-16h2v1h3v1h1v1h6v1h1v1h2l-1 2h1v1h2v1h1v1h-1v1h-4l-2-1h-4v1l-4-1h-2z" transform="matrix(.75325 0 0 .7816 4407 134)"/></g>
        <g id="n5" class="musicnote"><path fill="#2f2f2f" fill-rule="nonzero" d="M221 29h3v1l1-1v1h2v-1h6v1h1l1 2h1v1l2-1v1h1v1h-1v1h-1v1h-4l-1-1-2 1-2 1v1h-5l1 7 1-1 3 13h-1v2l-1 1v1h-1l1 1h-2v1l-3 1v-1h-2l-1-1h-1v-1h-1v-2l-1 1-1-3 1-1v-2h1v-1h1l-1-1h2v-1l3-1v1h2l1 1v-1l-1-6h-1l-3-16 2-1v1z" transform="matrix(.75325 0 0 .7816 4397 135)"/></g>
        <g id="n2" class="musicnote"><path fill="#2f2f2f" fill-rule="nonzero" d="M227 133l1-7h2l-1 13h-1v2h-1l-1 1-1 1h-2v1h-3v-1l-2-1v-1h-1v-1h-1l1-2h-1v-3h1v-2h1v-1h1v-1h2v-1l3 1v1h2v1h1zm2-14v7h-3l2-16h2l3 1v1h1v1h1v-1l5 1v1h1v1h2l-1 2h2l-1 1h2v1h1v1h-3v1h-2v-1h-2l-2-1v1h-6v-1h-2z" transform="matrix(.75325 0 0 .7816 4397 135)"/></g>
        <g id="n1" class="musicnote"><path fill="#2f2f2f" fill-rule="nonzero" d="M31 104l3 13h-1v2l-1 1v1h-1v1h-2v1l-3 1v-1h-2v-1h-1v-1h-1l-1-2h-1v-3h1v-2h1l-1-1h1v-1l2-1v-1h3v1h2l1 1v-1l-1-6 2-1zm-1-15l3-1v1h1v1h2v-1l4-1v1h2v1h1l1 2h1v1l1-1 1 1h1v1h-1v1h-2v1h-2v-1l-2 1v-1l-2 1-2 1-3 1v-1h-3m-1-9h-2l2 17 3-1-3-16z" transform="matrix(.75325 0 0 .7816 4392 143)"/></g>
        <g id="n7" class="musicnote"><path id="n7" fill="#2f2f2f" fill-rule="nonzero" d="M190 22l2 13h-1l1 2h-1v1h-1v1l-2 1v1h-3v-1l-2 1v-1h-1v-1h-1l-1-2-1 1v-3l1-1-1-2h1v-1h1v-1l2-1v-1h3v1l2-1v1h1l-2-7h3zm-3-16h3v1l2-1v1h1l4-1h2v1h2v2h1l1 1 1-1v1h1v1h-1v1h-1v1h-4v-1l-2 1-2 1v1h-6l2 7h-2l-4-16h2z" transform="matrix(.75325 0 0 .7816 4397 135)"/></g>
          
        </g></svg>

  <svg id="zombie" fill-rule="evenodd" stroke-linejoin="round" stroke-miterlimit="2" clip-rule="evenodd" viewBox="0 0 244 396">
  <g transform="matrix(1.32759 0 0 1.27943 -5843 -177)">
    <g><path fill="#676767" fill-rule="nonzero" d="M4445 258h91v36h-91z"/><path fill="#91c1a3" fill-rule="nonzero" d="M4473 244h35v21h-35z"/><path fill="#3a3a3a" fill-rule="nonzero" d="M4514 163h8v15h-62v-15h6v-7h48v7z"/><path fill="#9cd3b3" fill-rule="nonzero" d="M4515 178h7v14h14v22h-8v22h-6v7h-7v7h-14v8h-21v-8h-14v-7h-7v-7h-7v-22h-7v-22h14v-14h7v-7h49v7z"/><path fill="#fbeb8e" fill-rule="nonzero" d="M4494 185h23v22h-23zM4466 185h21v22h-21z"/><path fill="#758b7c" fill-rule="nonzero" d="M4480 229h8v7h-8z"/><path fill="#91c1a3" fill-rule="nonzero" d="M4487 200h7v21h-7z"/><path fill="#444445" fill-rule="nonzero" d="M4466 192h7v8h-7zM4501 185h7v7h-7z"/><path fill="#3a3a3a" fill-rule="nonzero" d="M4522 178h7v29h-7zM4452 178h7v29h-7z"/><path fill="#676767" d="M4577 293h2l3 15 2 14-8 20-9-40 10-9z"/><path fill="#9cd3b3" fill-rule="nonzero" d="M4579 295l-4-12-6 2 4 13z"/><path fill="#676767" d="M4406 295l-3-1-2 14v15l8 17 7-39-10-6z"/><path fill="#9cd3b3" fill-rule="nonzero" d="M4403 295l3-12 7 1-3 13z"/><path fill="#676767" fill-rule="nonzero" d="M4487 403h1v45h-55v-30h26v-45h28v30z"/><path fill="#9cd3b3" fill-rule="nonzero" d="M4459 396h29v7h-29z"/><path fill="#676767" fill-rule="nonzero" d="M4495 403v-30h29v45h25v30h-54v-45z"/><path fill="#9cd3b3" fill-rule="nonzero" d="M4524 396h-29v7h29z"/><path fill="#9e6330" d="M4542 253l-15 5-19 6-15 3-19-2-19-5-17-2-11-2-14 115 18 7 18 5 22 4 22 2 19-4 21-6 21-1 13-7-15-119-10 1z"/><path fill="#774b24" d="M4471 263h8l-5 126h-7zM4489 265h8v127h-8zM4505 261h8l3 127h-7zM4523 256h7l6 126-8 1zM4538 250l7-1 13 131-7 1z"/><path fill="#581610" d="M4406 325l6-68 4 1 1-4h4l1-4h4v-4h5l-13 145-4-1v-4h-4v-4l-4-1v-4h-4l4-52zm163 61l-21-138h5v4l5-1v4h5l1 3h4l10 69 7 44h-5l1 4-5 1 1 4-4 1v4l-4 1z"/><path fill="#774b24" d="M4452 258h8l-8 127-8-1zM4437 254l7 1-12 126-7-1z"/><path fill="#9cd3b3" fill-rule="nonzero" d="M4565 304l-1-6 15-3 4 27-15 2-1-6-6 1-2-14 6-1z"/><path fill="#330d09" d="M4566 292l5-1 6 39-5 1z"/><path fill="#48120d" d="M4567 297l5-1 4 29-5 1z"/><path fill="#6b6108" d="M4567 293l2-1 1 2-2 1zM4573 327h2v2h-2z"/><path fill="#9cd3b3" fill-rule="nonzero" d="M4417 317l-1 7-15-1 2-28 15 2v6l6 1-1 14-6-1z"/><path fill="#330d09" d="M4416 291l-5-1-3 40 5 1z"/><path fill="#48120d" d="M4416 296h-6l-2 29h5z"/><path fill="#6b6108" d="M4415 292h-2l-1 2h2zM4412 327l-2-1-1 3h2z"/></g>
  </g></svg>

</div>
<div class="backer">
  <svg fill-rule="evenodd" stroke-linejoin="round" stroke-miterlimit="2" clip-rule="evenodd" viewBox="0 0 244 396"><g transform="matrix(1.32759 0 0 1.27943 -5843 -177)"><path fill="#111" fill-rule="nonzero" d="M4459 178h1v-15h6v-7h48v7h8v15h7v14h7v22h-8v22h-6v7h-7v7h-7v8h15v-2h7v1l8-3-1-4h8v3l4-1-1-4h5v4l5-1v4h5l1 3h4l4 26 3-1 3 10h1l3 15 2 14-5 12 6 37h-5l1 4-5 1 1 4-4 1v4l-4 1-2-15-9 5v4l-7 1-1-3-15 1v3l-7 1v-3l-4 1v37h25v30h-54v-56h-6v-3h-2v7h1v52h-55v-30h26v-34l-7-1v2l-8-1v-2l-11-4-1 3-7-1v-4l-5-3-2 18-4-1v-4h-4v-4l-4-1v-4h-4l4-44-5-10v-15l2-14v1l3-12 4 1 2-27 4 1 1-4h4l1-4h4v-4h5l-1 11 6 1 1-4 7 1v4h1v-1h28v-8h-7v-7h-7v-7h-7v-22h-7v-22h7v-14h7z"/></g></svg>
</div>
<div class="background"></div>

<div class="note">* Note: Works best in Safari (That surprised me too)</div>

<div class="logo"><a href="https://undead.institute" target="_blank"><img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/1804713/UndeadInsti-LogoOnWhite.png" alt="Getting Braaains should be fun"></a></div>
              
            
!

CSS

              
                .toggle-checkbox:checked ~ .spotlights { 
  animation: 10s ease-in-out 0s movespotlight forwards;
}
@keyframes movespotlight {
  0% {
    left: 5vw;
    top: 4vw;
  }
  50%, 51% {
    left: 44.5vw;
    top: 4vw;
  }
  60%, 100% {
    left: 41vw;
    top: 1.5vw;
  }
}
.spotlights{
  position: relative;
  top: 4vw;
  left: 5vw;
  z-index: 100;
}
.toggle-checkbox:checked ~ .spotlights .spotlight { 
  animation: 10s ease-in-out 0s growspotlight forwards;
}
@keyframes growspotlight{
  0%, 51% {
    width: 11vw;
    height: 11vw;
  }
  60%, 100% {
    width: 16vw;
    height: 16vw;
  } 
}
.spotlight {
  width: 11vw;
  height: 11vw;
  background-image: url("https://assets.codepen.io/1804713/spotlight.svg");
  mix-blend-mode: overlay;
  position: absolute;
  top: 0;
  left: 0;
}
#zombie {
  width: 10vw;
  top: 6vw;
  left: 45vw;
  position: absolute;
  mix-blend-mode: multiply;
  z-index: 10;
}
.backer {
  width: 10vw;
  top: 6vw;
  left: 45vw;
  position: absolute;
}
.music {
  width: 10vw;
  position: absolute;
  top: 2vw;
  left: 45vw;
  z-index: 10;
}
#zombie {
  filter: drop-shadow(1vw 0px 1px rgba(0, 0,0, 0.75) );
}
.toggle-checkbox:checked ~ .z .musicnote { 
  animation: 4s ease-in-out calc( var(--multiplier) * 2s ) notes forwards infinite;
}
.musicnote {
  width: 1vw;
  height: 2vw;
  opacity: 0;
}
#n1 { --multiplier: 1 }
#n2 { --multiplier: 1.2 }
#n3 { --multiplier: 1.4 }
#n4 { --multiplier: 1.6 }
#n5 { --multiplier: 1.8 }
#n6 { --multiplier: 2 }
#n7 { --multiplier: 2.2 }

@keyframes notes {
  0% {opacity: 0; transform: translateY(0); }
  30%, 80% {opacity: 1;}
  100% {opacity: 0; transform: translateY(-2vw); }
}

.background {
  background-color: #660000;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  mix-blend-mode: multiply;
  z-index: -1;
}
body {
  background-color: #111;
  overflow: hidden;
}

.logo {
  width: 100%;
  max-width: 400px;
  position: absolute;
  top: 0;
  right: 0;
}
.logo img {
  width: 100%;
}
input{
  display: none;
}
input:checked + label {
  box-shadow: inset 3px 3px 2px #660000;
  transform: translate(3px, 3px);
}
label {
  font-size: 1.5em;
  color: #FFF;
  background-color: #960B0B;
  width: 140px;
  height: 30px;
  text-align: center;
  font-weight: bold;
  display: block;
  border-radius: 7px;
  box-shadow: 3px 3px 0 #660000;
  cursor: pointer;
  position: relative;
  z-index: 1000;
}
.note {
  color: #FFF;
  font-style: italic;
  width: 100%;
  text-align: center;
  position: absolute;
  bottom: 1vh;
}
              
            
!

JS

              
                
              
            
!
999px

Console