html {
  height: 100%;
}

body {
  color: white;
  background-color: black;
  margin: 0;
  overflow: hidden;
}

.float {
  position: absolute;
}

img {
  width: 100vw;
  height: 100vh;
}

.star {
  position: absolute;
  left: 0px;
  background-color: white;
  border-radius: 50%;
  animation-name: moveX;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

.small {
  top: 10px;
  width: 3px;
  height: 3px;
  animation-duration: 5s;
  background-color: gray;
}

.medium {
  top: 50px;
  width: 4px;
  height: 4px;
  animation-duration: 4s;
}

.big {
  left: 0px;
  top: 100px;
  width: 5px;
  height: 5px;
  animation-duration: 3s;
}
button {
  font-weight: bold;
  font-size: larger;
  display: inline-block;
}
p {
  font-family: sans-serif;
  display: inline-block;
  margin: 1rem;
}
@keyframes moveX {
  from {
    transform: translateX(100vw);
  }
  to {
    transform: translateX(-200px);
  }
}