<｜begin▁of▁sentence｜>### Instruction:
As a game tester, you've been assigned to evaluate and test a new video game. In this scenario, you need to save the game data into a file for further analysis. Utilizing igraph's functionality, you are tasked with saving the game graph, represented by the edge set [(0, 1), (1, 2), (2, 3), (3, 0)], into a GML file named 'simple_graph.gml'.
### Response:
from igraph import Graph

# Create a simple graph
edges = [(0, 1), (1, 2), (2, 3), (3, 0)]
g = Graph(edges)

# Write the graph to a GML file
g.write_gml('simple_graph.gml')
<|EOT|>
