<button class="radikalwp-btn-jelly">امتحان کن<//button>

.radikalwp-btn-jelly {
  padding: 13px 34px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #10b981, #059669);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  animation: radikalwp-jelly 2.4s ease-in-out infinite;
}
@keyframes radikalwp-jelly {
  0%, 100% { transform: scale(1, 1); }
  12% { transform: scale(1.06, .94); }
  24% { transform: scale(.96, 1.04); }
  36% { transform: scale(1.02, .98); }
  48% { transform: scale(1, 1); }
}