Description : Creating complex animations with SASS.
Answer :
Creating complex animations inSASS involves defining `@keyframes`for animation sequences and using mixins to apply them. For example, define a keyframe animation with`@keyframes spin { from { transform: rotate(0); } to { transform: rotate(360deg); } }` and use a mixin like `@mixin spin-animation { animation: spin 2s linear infinite; }`. Apply this mixin to elements to create a spinning effect with reusable code.