j = 6

while j >= 0:
    bottom_lbls = [b"tx1", b"tx2", b"tx3", b"tx4"]
    for i, lbl in zip(list(range(3, 7)), bottom_lbls):
        labels[i] = hashlib.sha256(lbl).hexdigest()

    labels[2] = hashlib.sha256((labels[5] + labels[6]).encode('utf-8')).hexdigest()
    labels[1] = hashlib.sha256((labels[3] + labels[4]).encode('utf-8')).hexdigest()
    labels[7] = "tx1"
    #Root
    labels[0] = hashlib.sha256((labels[1] + labels[2]).encode('utf-8')).hexdigest()
    nx.draw(G, positions, node_size = 1000)
    nx.draw_networkx_labels(G, positions, labels = labels, font_size = 8)
    nx.draw_networkx_labels(G, positions, labels = labels, font_size = 8)
    j -= 1