body {
  margin: 0;
  background: #070506;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

svg {
  width: 100%;
  height: 100%;
}

@keyframes p {
  0%   { opacity: .95; transform: scale(1); }
  50%  { opacity: .7;  transform: scale(.98); }
  100% { opacity: .95; transform: scale(1); }
}

.b {
  animation: p 4s ease-in-out infinite;
}