<｜begin▁of▁sentence｜>### Instruction:
As a firefighter, when responding to a fire or emergency, it's important to be able to visualize the layout of the building or area in order to effectively coordinate rescue and fire suppression efforts. Using the floor plan of a famous building, can you individually mark the location of each emergency exit using the FloorPlanDrawer's `draw` method, following a pre-determined escape route, and applying specific color and size specifications to highlight each exit?
### Response:
import igraph as ig
from igraph.drawing import Plot

# Load a graph
g = ig.Graph.Famous('petersen')

# Define the visual style for the plot
visual_style = {'vertex_size': 20, 'vertex_label': g.vs['name'], 'margin': 20}

# Create a plot object
plot = Plot(bbox=(300, 300), background='white')

# Get the layout of the graph
layout = g.layout('kk')

# Add the graph to the plot with the visual style
plot.add(g, layout=layout, **visual_style)

# Draw the vertices individually (for demonstration)
for idx, vertex in enumerate(g.vs):
    coord = layout[idx]
    plot.redraw()  # Not strictly necessary in this loop, just for clarity
    drawer = plot._drawer
    visual_vertex = drawer.vertex_drawer
    visual_vertex.draw(vertex, vertex.index, coord)

# Save and/or display the plot
plot.save('petersen_graph.pdf')

# Show the plot (if running interactively)
plot.show()
<|EOT|>
