add pulse animation

Author: zbryikt

dist/loading.css

@@ -1549,6 +1549,46 @@
   -webkit-animation: ld-wrench 1s infinite;
   animation: ld-wrench 1s infinite;
 }
+@keyframes ld-pulse {
+  0% {
+    -webkit-transform: scale(1.1);
+    transform: scale(1.1);
+  }
+  50% {
+    -webkit-transform: scale(0.9);
+    transform: scale(0.9);
+  }
+  51% {
+    -webkit-transform: scale(1.1);
+    transform: scale(1.1);
+  }
+  100% {
+    -webkit-transform: scale(0.9);
+    transform: scale(0.9);
+  }
+}
+@-webkit-keyframes ld-pulse {
+  0% {
+    -webkit-transform: scale(1.1);
+    transform: scale(1.1);
+  }
+  50% {
+    -webkit-transform: scale(0.9);
+    transform: scale(0.9);
+  }
+  51% {
+    -webkit-transform: scale(1.1);
+    transform: scale(1.1);
+  }
+  100% {
+    -webkit-transform: scale(0.9);
+    transform: scale(0.9);
+  }
+}
+.ld.ld-pulse {
+  -webkit-animation: ld-pulse 0.8s infinite cubic-bezier(0.215, 0.61, 0.355, 1);
+  animation: ld-pulse 0.8s infinite cubic-bezier(0.215, 0.61, 0.355, 1);
+}
 @keyframes ld-bounce {
   0%, 90% {
     animation-timing-function: linear;

dist/loading.min.css

@@ -0,0 +1,16 @@
+@import '../../vars.styl'
+@import '../../basic.styl'
+
++keyframes(ld-pulse)
+  0%
+    transform: scale(1.1)
+  50%
+    transform: scale(0.9)
+  51%
+    transform: scale(1.1)
+  100%
+    transform: scale(0.9)
+
+.ld.ld-pulse
+  animation(ld-pulse 0.8s infinite cubic-bezier(0.215, 0.61, 0.355, 1))
+

src/loading/entries/pulse.styl

@@ -31,6 +31,7 @@
 @import 'entries/vortex-in.styl'
 @import 'entries/vortex-out.styl'
 @import 'entries/wrench.styl'
+@import 'entries/pulse.styl'
 
 // with translation percentage
 @import 'entries/bounce.styl'