.bounds {
  width: 800px;
  height: 600px;
}

@keyframes hor-movement {
  from {
    margin-left: -3%;
  }
  to {
    margin-left: 100%;
  }
}

@keyframes ver-movement {
  from {
    margin-top: -3%;
  }
  to {
    margin-top: 46%;
  }
}

.image {
  animation-name: hor-movement, ver-movement;
  animation-duration: 3.141s, 1.414s;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  animation-timing-function: linear;
}