Update app.py

app.py

@@ -17,7 +17,7 @@ xx, yy = np.meshgrid(x, y)
 touch_points = np.column_stack((xx.ravel(), yy.ravel()))
 
 original_points = touch_points.copy()
-velocities = np.zeros_like(touch_points, dtype=bool)
+velocities = np.zeros_like(touch_points, dtype=np.bool_)
 
 source = ColumnDataSource(data=dict(x=touch_points[:, 0], y=touch_points[:, 1]))