diff --git a/sim_scenes/solar_system/halley_comet_lib.py b/sim_scenes/solar_system/halley_comet_lib.py
index 8afe35eacfee6373abe600641ba11547b10bf730..f17c8232bd7b5471bb9f50ddb953b457b780002a 100644
--- a/sim_scenes/solar_system/halley_comet_lib.py
+++ b/sim_scenes/solar_system/halley_comet_lib.py
@@ -90,7 +90,11 @@ class HalleyCometSimBase(UniverseSimScenes):
     def build_solar_system(self, ignore_gravity=False, start_time=None):
         # region 构建太阳系
         show_trail = False
-        self.sun = Sun(size_scale=0.6e2, show_trail=show_trail, texture="sun_light.jpg")
+        self.sun = Sun(size_scale=0.6e2, show_trail=show_trail,
+                       # color=(255, 250, 245),
+                       # texture="",
+                       texture="sun_light.jpg"
+                       )
         self.mercury = Mercury(size_scale=5e3, show_trail=show_trail)
         self.venus = Venus(size_scale=3e3, show_trail=show_trail)
         self.earth = Earth(size_scale=3e3, rotate_angle=0, show_trail=show_trail)
diff --git a/sim_scenes/solar_system/sun_earth.py b/sim_scenes/solar_system/sun_earth.py
index 96638c406472ab7bc666322d02deb482faeed7a5..becab2ee75a16ef62221eeff5d4d8c54c1e74c04 100644
--- a/sim_scenes/solar_system/sun_earth.py
+++ b/sim_scenes/solar_system/sun_earth.py
@@ -9,6 +9,7 @@
 from bodies import Sun, Earth, Sirius
 from common.consts import SECONDS_PER_WEEK, SECONDS_PER_DAY, AU
 from sim_scenes.func import mayavi_run, ursina_run
+from simulators.ursina.ursina_event import UrsinaEvent
 
 if __name__ == '__main__':
     """
@@ -19,10 +20,30 @@ if __name__ == '__main__':
         Earth(size_scale=2e3, distance_scale=1),  # 地球放大 2000 倍，距离保持不变
     ]
 
-    # 使用 mayavi 查看的运行效果
-    # mayavi_run(bodies, SECONDS_PER_WEEK, view_azimuth=-45)
+    circle = None
+
+    def on_ready():
+        global circle
+        from simulators.ursina.ursina_mesh import create_circle
+        from ursina import camera
+        # circle = create_circle(parent=None, scale=1e2)
+        # circle.set_light_off(True)
+
+
+    def on_timer_changed(time_data):
+        global circle
+        from ursina import camera
+        # circle.look_at(camera)
+        # circle.rotation_y = 90
+
+    # 运行中，每时每刻都会触发 on_timer_changed
+    UrsinaEvent.on_timer_changed_subscription(on_timer_changed)
+    # 运行前会触发 on_ready
+    UrsinaEvent.on_ready_subscription(on_ready)
 
     # 使用 ursina 查看的运行效果
     # 常用快捷键： P：运行和暂停  O：重新开始  I：显示天体轨迹
     # position = 左-右+、上+下-、前+后-
-    ursina_run(bodies, SECONDS_PER_WEEK, position=(0, AU, -4 * AU), show_trail=True)
+    ursina_run(bodies, SECONDS_PER_WEEK, position=(0, AU, -4 * AU),
+               timer_enabled=True,
+               show_trail=True)