Adding asteroids/fields and collision

asteroid.py

@@ -0,0 +1,11 @@
+import pygame
+from circleshape import CircleShape 
+class Asteroid(CircleShape):
+    def __init__(self, x, y, radius):
+        super().__init__(x, y, radius)
+    
+    def draw(self, screen):
+        pygame.draw.circle(screen, "white", self.position, self.radius, 2)
+
+    def update(self, dt):
+        self.position += (self.velocity * dt)