body {
  font-family: arial, sans-serif;
  background-color: #000;
  width: 100%;
  height: calc(100vh - 4rem);
  margin: 0;
}

.equalizer {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 10rem;
  margin-top: 4rem;
}

.equalizer-bar {
  width: 1.8rem;
  margin: 0 3px;
  display: flex;
  flex-direction: column-reverse;
}
.equalizer-bar span {
  display: block;
  height: 4px;
  border-radius: 2px;
  width: 100%;
  margin: 2px 0;
  background-color: #FFF;
  transition: .2s ease all;
  opacity: 1;
}
.equalizer-bar:nth-child(1) span {
  background: #fc0127;
}
.equalizer-bar:nth-child(2) span {
  background: #fb0275;
}
.equalizer-bar:nth-child(3) span {
  background: #b50cd3;
}
.equalizer-bar:nth-child(4) span {
  background: #6407e9;
}
.equalizer-bar:nth-child(5) span {
  background: #2a06a9;
}
.equalizer-bar:nth-child(6) span {
  background: #080ad7;
}
.equalizer-bar:nth-child(7) span {
  background: #0265e2;
}
.equalizer-bar:nth-child(8) span {
  background: #03fcfc;
}
.equalizer-bar:nth-child(9) span {
  background: #02fe46;
}
.equalizer-bar:nth-child(10) span {
  background: #05fb0f;
}
.equalizer-bar:nth-child(11) span {
  background: #97f611;
}
.equalizer-bar:nth-child(12) span {
  background: #f5e506;
}
.equalizer-bar:nth-child(13) span {
  background: #d7a414;
}
.equalizer-bar:nth-child(14) span {
  background: #fc6b02;
}
.equalizer-bar:nth-child(15) span {
  background: #df1506;
}