body, html {
  position: relative;
  min-height: 100vh;
  width: 100vw;
  overflow: hidden;
  margin: 0;
}


.blink {
  animation: blink-animation 1s steps(5, start) 20;
  -webkit-animation: blink-animation 1s steps(5, start) 20;
}
@keyframes blink-animation {
  to {
    visibility: hidden;
  }
}
@-webkit-keyframes blink-animation {
  to {
    visibility: hidden;
  }
}

* {
  box-sizing: border-box;
}

div {
  display: flex;
}

.footer {
  display: block;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50px;
  background: lightcoral;
  color: white;
  font-size: 14px;
  text-align: center;
  padding-top: 15px;
}