.block {
  opacity: 0;
  transition: all 1s ease;
}
.from-bottom {
  transform: translateY(100px);
}

.from-top {
  transform: translateY(-100px);
}

.from-left {
  transform: translateX(-100px);
}

.from-right {
  transform: translateX(100px);
}

.fade-in {
  opacity: 0;
}

.block.visible {
  opacity: 1;
  transform: translate(0, 0);
}