index.css

body {
  background-color: #000c1f;
}

#console {
  font-family: courier, monospace;
  color: #fff;
  width: 750px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 90px;
  font-size: 14px;
}

.blue {
  color: #2faef7;
}

.orange {
  color: #ff9742;
}

.purple {
  color: #d342ff;
}

.red {
  color: #ff4271;
}

.pink {
  color: #ff42d3;
}

.yellow {
  color: #ffcd42;
}

a {
  color: #0bc;
  text-decoration: none;
}

#a {
  color: #0f0;
}

#c {
  color: #0bc;
}

#b {
  color: #ff0096;
}

#k {
  animation: change 1s;
}

#op {
  color: #888888;
}

.gray {
  color: lightgray;
}

@keyframes change {
  0% {
    color: #0f0;
  }
  50% {
    color: #0f0;
  }
  99% {
    color: black;
  }
}