body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  background-color: #f0f0f0;
}

.container {
  position: relative;
}

.balloon {
  width: 50px;
  height: 70px;
  background-color: #ff5733;
  border-radius: 50% 50% 40% 40%;
  position: absolute;
  bottom: 0;
  cursor: pointer;
  animation: float 5s linear infinite;
}

@keyframes float {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-50px);
  }
  100% {
    transform: translateY(0);
  }
}