picoscroll scrollphathd like clock

import time
from picoscroll import PicoScroll
from picographics import PicoGraphics, DISPLAY_SCROLL_PACK, PEN_P8

graphics          = PicoGraphics(DISPLAY_SCROLL_PACK, pen_type=PEN_P8)
scroll            = PicoScroll()
scroll_brightness = 32

# Character pixel maps (3w x 5h font)
chr_3x5_zero =  [0,1,1,1,0],[1,0,0,0,1],[0,1,1,1,0]
chr_3x5_one =   [0,1,0,0,1],[1,1,1,1,1],[0,0,0,0,1]
chr_3x5_two =   [1,0,0,1,1],[1,0,1,0,1],[0,1,0,0,1]
chr_3x5_three = [1,0,0,0,1],[1,0,1,0,1],[0,1,0,1,0]
chr_3x5_four =  [0,1,1,1,0],[1,0,0,1,0],[0,0,1,1,1]
chr_3x5_five =  [1,1,1,0,1],[1,0,1,0,1],[1,0,0,1,0]
chr_3x5_six =   [0,1,1,1,0],[1,0,1,0,1],[0,0,0,1,0]
chr_3x5_seven = [1,0,0,1,1],[1,0,1,0,0],[1,1,0,0,0]
chr_3x5_eight = [0,1,0,1,0],[1,0,1,0,1],[0,1,0,1,0]
chr_3x5_nine =  [0,1,0,0,0],[1,0,1,0,1],[0,1,1,1,0]
chr_3x5_error = [1,1,1,1,1],[1,0,1,0,1],[1,0,1,0,1]
chr_3x5_list =  [chr_3x5_zero, chr_3x5_one, chr_3x5_two, chr_3x5_three, chr_3x5_four,
                 chr_3x5_five, chr_3x5_six, chr_3x5_seven, chr_3x5_eight, chr_3x5_nine]


# draw clock digit using above pixel map, left to right, top to bottom
def draw_3x5_character(x, y, digit):
    if digit >= 0 and digit <=9:
        _chr = chr_3x5_list[digit]
    else:
        _chr = chr_3x5_error
    graphics.set_pen(scroll_brightness)
    for _hor in range(3):
        for _vert in range(5):
            if(_chr[_hor][_vert] == 1):
                graphics.pixel(x + _hor, y + _vert)


def draw_clock():
    # save time to local list
    _time = time.localtime()                 # [0]=year, [1]=month, [2]=day, [3]=hour, [4]=minute, [5]=second
    # clear canvas
    graphics.set_pen(0)
    graphics.clear()
    # draw digits
    draw_3x5_character(0,0,_time[3] // 10)   # hour tens (0-2)
    draw_3x5_character(4,0,_time[3] % 10)    # hour units (0-9)
    draw_3x5_character(10,0,_time[4] // 10)  # minute tens (0-5)
    draw_3x5_character(14,0,_time[4] % 10)   # minute units (0-9)
    # draw colon between hours and minutes on odd seconds
    if(_time[5] % 2 != 0):
        graphics.set_pen(scroll_brightness)
        graphics.pixel(8,1)
        graphics.pixel(8,3)
    # seconds pixel bar across the bottom - borrowed from the scrollphathd clock example
    seconds_progress = 15 * ((_time[5] % 60) / 59.0)
    for y in range(15):
        current_pixel = min(seconds_progress, 1)
        graphics.set_pen(int(current_pixel * scroll_brightness))
        graphics.pixel(y + 1, 6)
        seconds_progress -= 1
        if seconds_progress <= 0:
            break
    # transfer canvas to display
    scroll.update(graphics)


while True:
    draw_clock()
    time.sleep(0.5)