GraphLayout
Graph drawing using simulated annealing for layout.
Input
path = 'output.png'
size = 800
edges = [
(1, 2), (1, 3), (1, 4), (2, 4), (2, 5), (3, 6),
(4, 3), (4, 6), (4, 7), (5, 4), (5, 7), (7, 6),
]
create_bitmap(path, size, edges)