Update README.md

Author: hildobby

README.md

@@ -4,7 +4,7 @@ Expanding and exploring the Bak-Sneppen model written in Python 3+
 
 By: [Hildebert Moulié](https://github.com/hildobby), [Philippe Nicolau](https://github.com/PNicolau96), [Louis Weyland](https://github.com/LouisWW) & [Binjie Zhou](https://github.com/binjiezhou).
 
-<p float="left" class="center">
+<p float="left" align="center">
   <img src="https://github.com/hildobby/Complex_System/blob/master/src/figures/lattice_itr%3D1.png" width="400" />
   <img src="https://github.com/hildobby/Complex_System/blob/master/src/figures/lattice-age_itr%3D2000.png" width="400" /> 
 </p>
@@ -21,29 +21,31 @@ By: [Hildebert Moulié](https://github.com/hildobby), [Philippe Nicolau](https:/
 ## Overview of some of the results
 
 ### Fitness over time
-![Fitness over time](https://github.com/hildobby/Complex_System/blob/master/src/figures/average_fitness_s%3D(20%2C%2020)_itr%3D2000_rep%3D10_std%3D0.3.png)
 
-### Impact of percentage of empty node
-<p float="left" class="center">
-  <img src="https://github.com/hildobby/Complex_System/blob/master/src/figures/avalanche_empy_space_percentage_comparison.png" width="400" />
-  <img src="https://github.com/hildobby/Complex_System/blob/master/src/figures/threshold_empy_space_percentage_comparison.png" width="400" /> 
+<p align="center">
+  <img src="https://github.com/hildobby/Complex_System/blob/master/src/figures/average_fitness_s%3D(20%2C%2020)_itr%3D2000_rep%3D10_std%3D0.3.png" />
 </p>
 
+### Impact of percentage of empty node
+<p align="center">
+  <img src="https://github.com/hildobby/Complex_System/blob/master/src/figures/avalanche_empy_space_percentage_comparison.png" />
+</p>
+<p align="center">
+  <img src="https://github.com/hildobby/Complex_System/blob/master/src/figures/threshold_empy_space_percentage_comparison.png" />
+</p>
 
 ### Cluster size distribution for different grid sizes
-![Cluster size distribution for different grid sizes](https://github.com/hildobby/Complex_System/blob/master/src/figures/cluster-sizes_rep=2000.png)
+<p align="center">
+  <img src="https://github.com/hildobby/Complex_System/blob/master/src/figures/cluster-sizes_rep=2000.png" />
+</p>
 
 ## Working with the repository
 
 Gathering the required packages
 ```
 pip3 install -r requirements.txt
 ```
-
-Running the model
-```
-python3 main.py
-```
+The code for the model is located in `src/lattice.py` and the graphs can be generated by calling the different functions in `src/main.py`. The file `results_presentation.ipynb` that was used to create the presentation of this project shows how the result figures as shown above can be generated. 
 
 Generating the presentation from the `results_presentation.ipynb` Jupyter notebook
 ```