"""Chapter 7, exercise 2 in Allen Downey's Think Complexity book.

Start with an r-pentomino as an initial condition and confirm that the results
are consistent with the description above. You might have to adjust the size of
the grid and the boundary behavior.

"""
import Life


class RPentomino(Life.Life):

    def __init__(self, n):
        super(RPentomino, self).__init__(n, mode='constant', cval=0, random=False)

        i, j = n / 2, n / 2
        self.array[i, j] = 1
        self.array[i, j - 1] = 1
        self.array[i, j + 1] = 1
        self.array[i - 1, j] = 1
        self.array[i + 1, j - 1] = 1

if __name__ == '__main__':
    life = RPentomino(150)
    viewer = Life.LifeViewer(life, delay=1)
    viewer.animate(steps=1200)