+void MonsterHere(int x, int y);
+void MakeShipHere(int x, int y);
+void StartFire(int x, int y);
+void OFireZone(int Xloc, int Yloc, int ch);
+void Destroy(int ox, int oy);
+void ExplodeSprite(SimSprite *sprite);
+int CanDriveOn(int x, int y);
+void DoBusSprite(SimSprite *sprite);
+void DoExplosionSprite(SimSprite *sprite);
+void DoTornadoSprite(SimSprite *sprite);
+void DoMonsterSprite(SimSprite *sprite);
+void DoShipSprite(SimSprite *sprite);
+void DoAirplaneSprite(SimSprite *sprite);
+void DoCopterSprite(SimSprite *sprite);
+void DoTrainSprite(SimSprite *sprite);
+void DrawSprite(SimView *view, SimSprite *sprite);
+void InitSprite(SimSprite *sprite, int x, int y);