.blob { background: black; border-radius: 50%; box-shadow: 0 0 0 0 rgba(0, 0, 0, 1); margin: 10px; height: 20px; width: 20px; transform: scale(1); animation: pulse-black 2s infinite; }
.blob.green { background: rgba(3, 149, 139, 1); box-shadow: 0 0 0 0 rgba(51, 217, 178, 1); animation: pulse-green 2s infinite; }

@keyframes pulse-green {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(51, 217, 178, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(51, 217, 178, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(51, 217, 178, 0); }
}