diff --git a/kos_sim/test_viewer.py b/kos_sim/test_viewer.py
index f270d1a..9af82f4 100644
--- a/kos_sim/test_viewer.py
+++ b/kos_sim/test_viewer.py
@@ -14,52 +14,58 @@
 import mujoco_viewer
 from kscale import K
 
-api = K()
 
-# Gets the base path.
-# zbot_dir = asyncio.run(api.download_and_extract_urdf("zbot-v2"))
-# zbot_mjcf = next(zbot_dir.glob("*.mjcf"))
+async def main() -> None:
+    api = K()
 
-zbot_mjcf = "/Users/ben/Github/urdfs/bots/kbot/gpr-20241204.mjcf"
+    # Gets the base path.
+    bot_dir = await api.download_and_extract_urdf("kbot-v1")
+    # bot_dir = await api.download_and_extract_urdf("zbot-v2")
+    bot_mjcf = next(bot_dir.glob("*.mjcf"))
 
-model = mujoco.MjModel.from_xml_path(str(zbot_mjcf))
-data = mujoco.MjData(model)
+    model = mujoco.MjModel.from_xml_path(str(bot_mjcf))
+    data = mujoco.MjData(model)
 
-# create the viewer object
-viewer = mujoco_viewer.MujocoViewer(model, data)
+    # create the viewer object
+    viewer = mujoco_viewer.MujocoViewer(model, data)
 
-# Get simulation timestep
-timestep = model.opt.timestep
-last_update = asyncio.get_event_loop().time()
-start_time = last_update
+    # Get simulation timestep
+    timestep = model.opt.timestep
+    last_update = asyncio.get_event_loop().time()
+    start_time = last_update
 
-mujoco.mj_step(model, data)
+    mujoco.mj_step(model, data)
 
-# simulate and render
-for _ in range(100000):
-    if viewer.is_alive:
-        current_time = asyncio.get_event_loop().time()
-        sim_time = current_time - last_update
+    # simulate and render
+    for _ in range(100000):
+        if viewer.is_alive:
+            current_time = asyncio.get_event_loop().time()
+            sim_time = current_time - last_update
 
-        # Calculate elapsed time since start for sinusoidal motion
-        elapsed_time = current_time - start_time
+            # Calculate elapsed time since start for sinusoidal motion
+            elapsed_time = current_time - start_time
 
-        # Apply sinusoidal motion to each joint
-        # Adjust amplitude and frequency as needed
-        amplitude = 0.5  # radians
-        frequency = 0.5  # Hz
-        for i in range(model.nu):
-            data.ctrl[i] = amplitude * math.sin(2 * math.pi * frequency * elapsed_time)
+            # Apply sinusoidal motion to each joint
+            # Adjust amplitude and frequency as needed
+            amplitude = 3.14159  # radians
+            frequency = 0.5  # Hz
+            for i in range(model.nu):
+                data.ctrl[i] = amplitude * math.sin(2 * math.pi * frequency * elapsed_time)
 
-        # Step the simulation to match real time
-        # while sim_time > 0:
-        #     mujoco.mj_step(model, data)
-        #     sim_time -= timestep
+            # Step the simulation to match real time
+            while sim_time > 0:
+                mujoco.mj_step(model, data)
+                sim_time -= timestep
 
-        last_update = current_time
-        viewer.render()
-    else:
-        break
+            last_update = current_time
+            viewer.render()
+        else:
+            break
 
-# close
-viewer.close()
+    # close
+    viewer.close()
+
+
+if __name__ == "__main__":
+    # python -m kos_sim.test_viewer
+    asyncio.run(main())