* {
  box-sizing: border-box;
}
body {
  background-color: #111;
  min-height: 100vh;
}
body:after {
  background: radial-gradient(transparent, #111);
  bottom: 0;
  content: '';
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}
.grid {
  -webkit-filter: blur(2px);
          filter: blur(2px);
}
.grid:before {
  background: repeating-linear-gradient(0deg, #2eec71 0, #2eec71 2px, transparent 2px, transparent 40px), repeating-linear-gradient(90deg, #2eec71 0, #2eec71 2px, transparent 2px, transparent 40px);
  content: '';
  height: 100vh;
  position: absolute;
  top: 0;
  width: 100vw;
}
.ekg {
  left: 50%;
  max-width: 300px;
  position: absolute;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}
.ekg:nth-of-type(1),
.ekg:nth-of-type(3) {
  -webkit-filter: blur(10px);
          filter: blur(10px);
}
@media (min-width: 768px) {
  .ekg {
    max-width: 500px;
  }
}
.ekg path {
  -webkit-animation: draw 1s infinite ease-out forwards;
          animation: draw 1s infinite ease-out forwards;
  stroke: #2eec71;
}
.ekg--novelty {
  display: none;
}
.ekg--novelty path {
  -webkit-animation-duration: 1.2s;
          animation-duration: 1.2s;
}
label {
  align-items: center;
  bottom: 20px;
  cursor: pointer;
  display: flex;
  height: 50px;
  justify-content: center;
  position: fixed;
  right: 50px;
  width: 50px;
  z-index: 2;
}
input {
  cursor: pointer;
  margin: 4px;
  position: fixed;
  bottom: 36px;
  right: 40px;
  z-index: 2;
}
input:checked ~ .ekg--original {
  display: none;
}
input:checked ~ .ekg--novelty {
  display: block;
}
@-webkit-keyframes draw {
  75% {
    opacity: 1;
    stroke-dashoffset: 0;
  }
  100% {
    opacity: 0;
    stroke-dashoffset: 0;
  }
}
@keyframes draw {
  75% {
    opacity: 1;
    stroke-dashoffset: 0;
  }
  100% {
    opacity: 0;
    stroke-dashoffset: 0;
  }
}