.glowy0 {
  animation: lightshow 2s infinite;
  transition: text-shadow 3s;
}

.glowy1 {
  animation: lightshow 0.8s infinite alternate;
  transition: text-shadow 1s;
}

.glowy2 {
  animation: lightshow ease-in 2s infinite alternate;
  transition: text-shadow 3s;
}

.glowy3 {
  animation: lightshow 8s infinite reverse;
  transition: text-shadow 3s;
}