<｜begin▁of▁sentence｜>### Instruction:
As an insurance agent working for a major insurance company, your goal is to promote and sell insurance products to individuals, families, and businesses in order to provide financial security and peace of mind. You are responsible for managing risk and protecting assets by offering a range of insurance services. Imagine that you have an empty portfolio of clients, and your task is to add three new potential clients to the portfolio along with one client who has a specific attribute such as a preferred color. How would you approach this task to ensure that the portfolio represents a diverse group of potential clients?
### Response:
import igraph as ig

# Create an empty graph
g = ig.Graph()

# Add 3 vertices to the graph
g.add_vertices(3)

# Add another vertex with a name
vertex_name = 'new_vertex'
g.add_vertices(vertex_name, attributes={'color': 'blue'})

# Display the graph details
print('Vertices:', g.vcount())
print('Vertex names:', g.vs['name'])
print('Vertex colors:', g.vs['color'])
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