Use the previously defined animation

animation.css

/* Step 2: Set up the animation */
.circle {
  -webkit-animation: move 2s infinite,
                     shrinkGrow 1s linear infinite alternate,
                     change 6s 2s linear infinite;
  animation: move 2s infinite,
                     shrinkGrow 1s linear infinite alternate,
                     change 6s 2s linear infinite;
}

.circle {
  -webkit-animation: fadeInOut 2s infinite alternate; 
  animation: fadeInOut 2s infinite alternate; 
}