Get lost
-----------------------

    * **Topic:** random walks, particle density, diffusion, brownian motion
    * **Task A:** 
        1. Implement a function to make the lattice-bound
           random walker take unit steps on a grid.
        2. Simulate the motion of a single particle and
           check that the simulator works.
        3. Simulate the motion of, say, 10000 particles.
        4. Study the distribution of these particles
           as a function of time. What does this tell
           us about diffusion?
    * **Task B:** 
        1. Implement a function to have the freely
           moving particle from previous lecture
           take normally distributed random steps.
        2. Simulate this random walk.
    * **Templates:** 
        - `random_walk_lattice.py <http://users.utu.fi/tejohy/teaching/simu/templates/random_walk_lattice.py>`_
        - `random_walk_free.py <http://users.utu.fi/tejohy/teaching/simu/templates/random_walk_free.py>`_
    * **Further reading:**
        - https://en.wikipedia.org/wiki/Random_walk
        - https://en.wikipedia.org/wiki/Diffusion
        - https://en.wikipedia.org/wiki/Brownian_motion


random_walk_lattice.py
#######################

.. automodule:: random_walk_lattice
    :members:
    :undoc-members:
   
 

random_walk_free.py
#####################

.. automodule:: random_walk_free
    :members:
    :undoc-members: