Compass SCSS keyframe + animation usage (keep forgetting syntax way too often)

scss blink

  // opacity is animated from 0 to 1 and back to 0 in a single loop
  @include keyframes( toggle-opacity )
  {
      0%, 100% { @include opacity(0); }
      25%, 75% { @include opacity(0.5); }
      50% { @include opacity(1); }
  }

  // blink (animate toggle-opacity)
  .blink {
    @include animation(toggle-opacity 1s infinite);
  }