import time
from itertools import cycle, islice

def increasing_cyclical(xs, period, max_width):
    while True:
        for x in range(period):
            g = list(islice(cycle(xs), period+x))[x:]
            for y in range(max_width):
                yield list(islice(iter(g), y+1))


def increasing_cyclical(xs, period, max_width):
    for x in range(period):
        g = list(islice(cycle(xs), period+x))[x:]
        for y in range(max_width):
            yield list(islice(iter(g), y+1))