.neon-red-blue {
  color: #FF0000;
  text-shadow:
    0 0 5px #FF0000,
    0 0 10px #0000FF,
    0 0 20px #0000FF,
    0 0 40px #0000FF,
    0 0 80px #0000FF;
}

.neon-red-yellow {
  color: #FF0000;
  text-shadow:
    0 0 5px #FF0000,
    0 0 10px #FFFF00,
    0 0 20px #FFFF00,
    0 0 40px #FFFF00,
    0 0 80px #FFFF00;
}

.neon-white-red {
  color: #FFFFFF;
  text-shadow:
    0 0 5px #FFFFFF,
    0 0 10px #FF0000,
    0 0 20px #FF0000,
    0 0 40px #FF0000,
    0 0 80px #FF0000;
}