--- /dev/null
+#include <SDL.h>
+#include "shape.h"
+
+int init_rocks(void);
+void new_rocks(void);
+void reset_rocks(void);
+void move_rocks(void);
+void draw_rocks(void);
+int hit_rocks(float x, float y, struct shape *shape);
+void blast_rocks(float x, float y, float radius, int onlyslow);