body {
  background: #000;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 12px;
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.controls {
  margin-bottom: 40px;
}

button {
  background: none;
  border: none;
  padding: 10px;
  color: #eee;
  outline: none;
  cursor: pointer;
}

button.active {
  background: rgba(255, 255, 255, 0.1);
}

.dancefloor {
  display: flex;
  flex-direction: column;
  color: #444;
}

.top {
  display: flex;
  align-items: center;
  justify-content: center;
}

.strobe {
  margin: 10px;
  width: 50px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: center;
  align-items: center;
}

.strobe.on {
  background: rgb(255, 255, 255);
  animation: blinking 0.3s linear infinite;
}

.blinder {
  margin: 10px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: center;
  align-items: center;
}

.blinder.on {
  background: rgb(255, 255, 0);
  animation: blinking 0.75s linear infinite;
}

.blinder:nth-child(1) {
  animation-delay: 0.1s;
}

.blinder:nth-child(2) {
  animation-delay: 0.2s;
}

.blinder:nth-child(3) {
  animation-delay: 0.3s;
}

.blinder:nth-child(4) {
  animation-delay: 0.4s;
}

.blinder:nth-child(5) {
  animation-delay: 0.5s;
}

.fields {
  display: flex;
  flex-wrap: wrap;
  width: 500px;
  height: 500px;
}

.field {
  width: 100px;
  height: 100px;
  border: 2px solid #000;
  box-sizing: border-box;
  background: rgba(255, 255, 255, 0.1);
  transition: 0.2s;
  display: flex;
  justify-content: center;
  align-items: center;
}

.red {
  background-color: red;
  color: #fff;
}

.green {
  background-color: green;
  color: #fff;
}

.blue {
  background-color: blue;
  color: #fff;
}

@keyframes blinking {
  0% {
    opacity: 0.3;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0.3;
  }
}