* {
  box-sizing: border-box;
}

body {
  background-color: darkslateblue;
}



.zombie {
  position: relative;
  display: flex;
  width: 10%;
  flex-direction: column;
animation: move 10s infinite;
}


@keyframes move {
  0% {
left: -15vw;
}
100% {
left: 100vw;
}
}

.zombier {
  position: relative;
    display: flex;
  width: 10%;
  flex-direction: column;
  animation: mover 10s infinite;
}

@keyframes mover {
  0% {
right: -15vw;
}
100% {
right: 100vw;
}
}