Update app.py

app.py

@@ -11,6 +11,11 @@ background: linear-gradient(115deg,#4fcf70,#fad648,#a767e5,#12bcfe,#44ce7b);
   animation: rotate 1.5s linear infinite;
 }
 background-image:url("colors-pattern.gif")
+@keyframes rotate {
+  100%{
+    filter: hue-rotate(-360deg)
+  }
+}
 </style>
 """