<｜begin▁of▁sentence｜>### Instruction:
Given a cycle graph with 4 nodes, can you use default_edge_colors to assign a color to each edge and then draw the graph with NetworkX, assuming no colors have been defined yet?
### Response:
import networkx as nx
import matplotlib.pyplot as plt

# Create a NetworkX graph
G = nx.cycle_graph(4)
# Assign default edge colors
edge_colors = nx.get_edge_attributes(G, 'color')
if not edge_colors:
    edge_colors = ['black' for edge in G.edges()]
# Draw the graph
pos = nx.circular_layout(G)
nx.draw(G, pos, edges=G.edges(), edge_color=edge_colors)
plt.show()
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