Update _mixins.sass

_mixins.sass

@@ -5,6 +5,10 @@
   right: 0
   bottom: 0
 
+@mixin sizeCube($size: 1rem)
+  width: $size
+  height: $size
+
 /*
  * $size: all, top, right, bottom, left
  */
@@ -23,7 +27,8 @@
     box-shadow: inset 0 -#{$size} 0 0 $color
 
 @mixin animationRotate($speed: 1s)
-  @keyframes animationRotate
+  $id: unique-id()
+  @keyframes#{$id}
       from
         transform: rotate(0)
       to
@@ -35,13 +40,14 @@
     timing-function: linear
 
 @mixin animationPulse($speed: 1s, $size: 1rem, $color: black, $iteration: infinite)
-  @keyframes animationPulse
+  $id: unique-id()
+  @keyframes #{$id}
       from
         box-shadow: 0 0 0 0 $color
       to
         box-shadow: 0 0 0 $size transparentize($color, 1)
   animation:
-    name: animationPulse
+    name: $id
     duration: $speed
     iteration-count: $iteration
     timing-function: linear