.button {
  width: 140px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0px 15px;
  background-color: red;
  border-radius: 10px;
  border: none;
  color: white;
  position: relative;
  cursor: pointer;
  font-weight: 900;
  transition-duration: .2s;
  background: linear-gradient(0deg, #000, #272727);
}

.button:before, .button:after {
  content: '';
  position: absolute;
  left: -2px;
  top: -2px;
  border-radius: 10px;
  background: linear-gradient(45deg, #fb0094, #0000ff, #00ff00,#ffff00, #ff0000, #fb0094, 
		#0000ff, #00ff00,#ffff00, #ff0000);
  background-size: 400%;
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  z-index: -1;
  animation: steam 20s linear infinite;
}

@keyframes steam {
  0% {
    background-position: 0 0;
  }

  50% {
    background-position: 400% 0;
  }

  100% {
    background-position: 0 0;
  }
}

.button:after {
  filter: blur(50px);
}