style.css

body {
  box-sizing: border-box;
  background-color: aliceblue;
}

.container {
  background-color: #051730;
  padding: 10px;
  height: 250px;
  width: 55%;
  transform: rotate(180deg);
  margin: auto;
  display: flex;
}

.blue {
  background-color: #7854bc;
  width: 150px;
  height: 150px;
  position: relative;
  animation-name: dance;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: cubic-bezier(0.35, 0.17, 0.43, 0.6);
  animation-direction: alternate;
}

.purple {
  background-color: #d152a8;
  width: 150px;
  height: 150px;
  position: relative;
  animation-name: dance;
  animation-duration: 4s;
  animation-iteration-count: infinite;
  animation-timing-function: cubic-bezier(0.58, 0.31, 0.34, 0.9);
  animation-direction: alternate;
}

.red {
  background-color: #fd6485;
  width: 150px;
  height: 150px;
  position: relative;
  animation-name: dance;
  animation-duration: 3s;
  animation-iteration-count: infinite;
  animation-timing-function: cubic-bezier(0.1, 0.31, 0.34, 1);
  animation-direction: alternate;
}

.orange {
  background-color: #ff8a66;
  width: 150px;
  height: 150px;
  position: relative;
  animation-name: dance;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  animation-direction: alternate;
}

.yellow {
  background-color: #ffbe55;
  width: 150px;
  height: 150px;
  position: relative;
  animation-name: dance;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: cubic-bezier(0.9, 0.1, 0.5, 1);
  animation-direction: alternate;
}

@keyframes dance {
  from {
    height: 100%;
  }
  to {
    height: 0%;
  }
}

.box {
  animation-play-state: paused;
}

.myButton {
  margin-left: 37.5%;
  margin-top: 25px;
}

button {
  width: 5rem;
  padding: 3px 8px;
}

.button-1 {
  display: inline-block;
  margin-left: 40px;
  border: 1px solid green;
  background-color: darkgreen;
  color: white;
  cursor: pointer;
}

.button-2 {
  display: inline-block;
  margin: 5px 125px;
  border: 1px solid red;
  background-color: red;
  color: white;
  cursor: pointer;
}