diff --git a/sim_lab/the_lost_planet.py b/sim_lab/the_lost_planet.py
index 3ff89834580f3a3d011987a603ff4f8c3fe72f09..cc379a94e797d855b04d149a1a33f54f3bb219b9 100644
--- a/sim_lab/the_lost_planet.py
+++ b/sim_lab/the_lost_planet.py
@@ -6,6 +6,8 @@
 # link            :https://gitcode.net/pythoncr/
 # python_version  :3.9
 # ==============================================================================
+import time
+
 from bodies import Sun, Mercury, Venus, Earth, Mars, Moon, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Asteroids
 from common.consts import SECONDS_PER_WEEK, SECONDS_PER_DAY, SECONDS_PER_MONTH, SECONDS_PER_YEAR, AU
 from sim_scenes.func import mayavi_run, ursina_run, create_sphere_sky
@@ -101,6 +103,10 @@ if __name__ == '__main__':
         # camera.look_at(sun.planet)
         camera.rotation_z -= 90
 
+        # for i in range(10):
+        #     time.sleep(0.1)
+        #     create_asteroid()
+
         # UniverseSimScenes.show_grid_axises()
 
         asteroids.planet.enabled = False
@@ -136,6 +142,25 @@ if __name__ == '__main__':
         # ext_fun_for_method(planet, after_run_fun=alpha_animation)
 
 
+    def create_asteroid():
+        from ursina import Entity, color, Vec3
+        import math
+        import random
+        pos = moon.planet.position  # + Vec3()
+        radius = moon.planet.position[2] + 40 * random.random() - 20  # * moon.distance_scale
+        asteroid = Entity(model='sphere', position=pos, color=color.white, scale=1.5)
+        asteroid.s_angle = 89.5
+
+        def rotation():
+            x = sun.planet.x + radius * math.cos(asteroid.s_angle)
+            z = sun.planet.z + radius * math.sin(asteroid.s_angle)
+            asteroid.position = (x, 10 * random.random() - 5, z)
+            speed = random.random() / 15
+            asteroid.s_angle += speed
+
+        asteroid.update = rotation
+
+
     #
     # def after_ready():
     #     from ursina import camera, Vec3
@@ -158,11 +183,12 @@ if __name__ == '__main__':
             set_alpha_animation(moon, 0.0, 1.0, 0.005)
             setattr(moon, "years_6", True)
         elif time_data.years > 8 and not hasattr(asteroids, "years_8"):
-            set_alpha_animation(asteroids, 0.0, 1.0, 0.01)
-            setattr(asteroids, "years_8", True)
-
-        if time_data.years > 8 and not hasattr(moon, "years_8"):
+            # set_alpha_animation(asteroids, 0.0, 1.0, 0.01)
+            for i in range(3):
+                create_asteroid()
 
+        if time_data.years > 11 and not hasattr(moon, "mars_rotation"):
+            setattr(asteroids, "years_8", True)
             moon.planet.look_at(mars.planet)
             radius = 12
             d = distance(moon.planet, mars.planet.position)
@@ -180,9 +206,9 @@ if __name__ == '__main__':
                 setattr(mars, "moon_angle", moon_angle + 0.08)
 
                 if moon_angle >= 110:
-                    setattr(moon, "years_8", True)
+                    setattr(moon, "mars_rotation", True)
 
-                print("moon_angle",moon_angle)
+                print("moon_angle", moon_angle)
 
         elif hasattr(mars, "moon_angle") and not hasattr(moon, "earth_rotation"):
             earth_target = earth.planet.main_entity