loading-animation

 <li className="message-item assistant-message-container">
    <div className="assistant-message">
      <div className="loading-animation">
        <div className="loading-circle purple"></div>
        <div className="loading-circle blue"></div>
        <div className="loading-circle green"></div>
      </div>
   </div>
</li>
  
  
.assistant-message-container {
  display: flex;
  justify-content: flex-start;
}

.assistant-message {
  background-color: #fff;
  align-self: flex-start;
  word-wrap: break-word;
  max-width: 90%;
  margin-left: -10px;
  margin-right: 0%;
  border-radius: 20px 20px 20px 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 10px;
  align-items: center;
}

.loading-animation {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 30px;
}

.loading-circle {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #333;
  margin: 0 5px;
  animation: bounce 0.6s infinite alternate;
}

.purple {
  background-color: #9b59b6;
}

.blue {
  background-color: #3498db;
  animation-delay: 0.2s;
}

.green {
  background-color: #2ecc71;
  animation-delay: 0.4s;
}

.loading-circle:nth-child(2) {
  animation-delay: 0.2s;
}

.loading-circle:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes bounce {
  from {
    transform: translateY(0) rotate(0) scale(1);
  }
  to {
    transform: translateY(-15px) rotate(360deg) scale(0.8);
  }
}