diff --git a/assets/gui/css/alas.css b/assets/gui/css/alas.css
index 7d085f1..a31fefb 100644
--- a/assets/gui/css/alas.css
+++ b/assets/gui/css/alas.css
@@ -315,6 +315,16 @@ pre.rich-traceback-code {
     margin: 0;
 }
 
+.anim-rotate {
+    animation: rotate-keyframes 0.4s linear infinite
+}
+
+@keyframes rotate-keyframes {
+    100% {
+        transform: rotate(360deg)
+    }
+}
+
 #pywebio-scope-contents {
     margin-top: 0;
     overflow-y: auto;
diff --git a/module/webui/app.py b/module/webui/app.py
index e32f040..957788c 100644
--- a/module/webui/app.py
+++ b/module/webui/app.py
@@ -108,6 +108,11 @@ class AlasGUI(Frame):
         self.alas_config = AzurLaneConfig("template")
         self.alas_config_hidden = set()
         self.initial()
+        # rendered state cache
+        self.rendered_cache = []
+        self.inst_cache = []
+        self.load_home = False
+        self.af_flag = False
 
     @use_scope("aside", clear=True)
     def set_aside(self) -> None:
@@ -119,12 +124,11 @@ class AlasGUI(Frame):
             ],
             onclick=[self.ui_develop],
         ),
-        for name in alas_instance():
-            put_icon_buttons(
-                Icon.RUN,
-                buttons=[{"label": name, "value": name, "color": "aside"}],
-                onclick=self.ui_alas,
-            )
+        put_scope("aside_instance", [
+            put_scope(f"alas-instance-{i}", [])
+            for i, _ in enumerate(alas_instance())
+        ])
+        self.set_aside_status()
         put_icon_buttons(
             Icon.ADD,
             buttons=[
@@ -133,6 +137,52 @@ class AlasGUI(Frame):
             onclick=[self.ui_add_alas],
         ),
 
+        current_date = datetime.now().date()
+        if current_date.month == 4 and current_date.day == 1:
+            self.af_flag = True
+
+    @use_scope("aside_instance")
+    def set_aside_status(self) -> None:
+        flag = True
+
+        def update(name, seq):
+            with use_scope(f"alas-instance-{seq}", clear=True):
+                icon_html = Icon.RUN
+                rendered_state = ProcessManager.get_manager(inst).state
+                if rendered_state == 1 and self.af_flag:
+                    icon_html = icon_html[:31] + ' anim-rotate' + icon_html[31:]
+                put_icon_buttons(
+                    icon_html,
+                    buttons=[{"label": name, "value": name, "color": "aside"}],
+                    onclick=self.ui_alas,
+                )
+            return rendered_state
+
+        if not len(self.rendered_cache) or self.load_home:
+            # Reload when add/delete new instance | first start app.py | go to HomePage (HomePage load call force reload)
+            flag = False
+            self.inst_cache.clear()
+            self.inst_cache = alas_instance()
+        if flag:
+            for index, inst in enumerate(self.inst_cache):
+                # Check for state change
+                state = ProcessManager.get_manager(inst).state
+                if state != self.rendered_cache[index]:
+                    self.rendered_cache[index] = update(inst, index)
+                    flag = False
+        else:
+            self.rendered_cache.clear()
+            clear("aside_instance")
+            for index, inst in enumerate(self.inst_cache):
+                self.rendered_cache.append(update(inst, index))
+            self.load_home = False
+        if not flag:
+            # Redraw lost focus, now focus on aside button
+            aside_name = get_localstorage("aside")
+            self.active_button("aside", aside_name)
+
+        return
+
     @use_scope("header_status")
     def set_status(self, state: int) -> None:
         """
@@ -1082,6 +1132,7 @@ class AlasGUI(Frame):
 
     def show(self) -> None:
         self._show()
+        self.load_home = True
         self.set_aside()
         self.init_aside(name="Home")
         self.dev_set_menu()
@@ -1227,6 +1278,7 @@ class AlasGUI(Frame):
         )
 
         self.task_handler.add(self.state_switch.g(), 2)
+        self.task_handler.add(self.set_aside_status, 2)
         self.task_handler.add(visibility_state_switch.g(), 15)
         self.task_handler.add(update_switch.g(), 1)
         self.task_handler.start()