from microbit import * 
# indentations in text are important 
# analogue input on port 0 
# (** need a low pass filter on i/p **)
# use 0 and 3V to rotator pot
# 128 units between each arrow
# but N displayed twice (0 and 360) so 64 each
while True:   
    voltage = pin0.read_analog()
    if voltage >0 and voltage <64:
        display.show(Image.ARROW_N) 
    if voltage >65 and voltage <192:
        display.show(Image.ARROW_NE)
    if voltage >193 and voltage <320:
        display.show(Image.ARROW_E)
    if voltage >321 and voltage <448:
        display.show(Image.ARROW_SE) 
    if voltage >449 and voltage <576:
        display.show(Image.ARROW_S) 
    if voltage >577 and voltage <704:
        display.show(Image.ARROW_SW)
    if voltage >705 and voltage <832:
        display.show(Image.ARROW_W)
    if voltage >833 and voltage <960:
        display.show(Image.ARROW_NW)
    if voltage >961 and voltage <1024:
        display.show(Image.ARROW_N)
    sleep(100)