def METHOD_NAME(self, world, np_random):
    # random properties for agents
    for i, agent in enumerate(world.agents):
        agent.color = np.array([0.25, 0.25, 0.25])
    # random properties for landmarks
    for i, landmark in enumerate(world.landmarks):
        landmark.color = np.array([0.75, 0.75, 0.75])
    world.landmarks[0].color = np.array([0.75, 0.25, 0.25])
    # set random initial states
    for agent in world.agents:
        agent.state.p_pos = np_random.uniform(-1, +1, world.dim_p)
        agent.state.p_vel = np.zeros(world.dim_p)
        agent.state.c = np.zeros(world.dim_c)
    for i, landmark in enumerate(world.landmarks):
        landmark.state.p_pos = np_random.uniform(-1, +1, world.dim_p)
        landmark.state.p_vel = np.zeros(world.dim_p)