Creating a custom .col file

[sundar19]

Hello,
I was able to successfully run the code , but I need to create a grid based graph something similar to this

import networkx as nx
from matplotlib import pyplot as plt

G = nx.grid_2d_graph(10,10)

plt.figure(figsize=(12,12))
pos = {(x,y):(y,-x) for x,y in G.nodes()}
plt.figure(figsize=(12,12))
nx.draw(G, pos=pos, 
        node_color='lightgreen', 
        with_labels=True,
        node_size=600)

Can you please let me know how to generate a .col file for the same?

Thank you