import time
import machine

pins=[6,7,8,9,10,11,12,13,14,15]

leds=[]

for pin_number in pins:
    led=machine.Pin(pin_number,machine.Pin.OUT)
    leds.append(led)

pot=machine.ADC(26)

def all_on():
    for led in leds:
        led.value(1)

def all_off():
    for led in leds:
        led.value(0)

###################################

def read_speed():
    value=pot.read_u16()
    level=int(value/65535*10)
    return level

###################################

while True:
    speed=read_speed()
    all_off()

    for i in range(speed):
        leds[i].value(1)

    if speed==0:
        print("The car is parked")

    elif speed<=4:
        print("Safe speed ",speed)

    elif speed<=7:
        print("Medium speed ",speed)

    elif speed<=9:
        print("warning! High speed ",speed)

    elif speed>=10:
        print("Danger ! Exceeding the maximum limit ")

        for _ in range(5):
            all_on()
            time.sleep(0.1)
            all_off()
            time.sleep(0.1)