plt.figure()
    plt.plot([0, n], [0, n], ls = 'none')
    plt.xticks(range(n + 1)) ; plt.yticks(range(n + 1))
    plt.plot(posisAgnX, posisAgnY, 'bo-')
    plt.plot(posisLoupX, posisLoupY, 'gx--')
    plt.text(0.1, 0, 'DÉPART AGNEAU', va = 'bottom',
             ha = 'left', color = 'blue', rotation = 0)
    plt.text(n - .1, n - .1, 'DÉPART LOUP', va = 'top',
             ha = 'right', color = 'green', rotation = 0)
    if rencontre == 1:
        plt.plot(posisAgnX[n], posisAgnY[n], marker = '*',
                 markerfacecolor = 'red', markersize = 10)
        plt.text(posisAgnX[n], posisAgnY[n] - .1, 'RENCONTRE',
                 va = 'top', ha = 'center', color = 'red')
    plt.grid()
    plt.show()