@keyframes words {
  0%,
  20% {
    content: "Programador Web";
  }
  21%,
  40% {
    content: "Desarrollador Web";
  }
  41%,
  60% {
    content: "Programador Frontend";
  }
  61%,
  80% {
    content: "Ingeniero en Sistemas";
  }
  81%,
  100% {
    content: "Ingeniero de Software";
  }
}