@keyframes rubberBand { 
  0%, 100% { transform: scale3d(1, 1, 1); }
  30% { transform: scale3d(1.25, 0.75, 1); }
  40% { transform: scale3d(0.75, 1.25, 1); }
  50% { transform: scale3d(1.15, 0.85, 1); }
  65% { transform: scale3d(0.95, 1.05, 1); }
  75% { transform: scale3d(1.05, 0.95, 1); }
}
.rubberBand { animation-name: rubberBand; }