import time
from machine import Pin

led_pins = [2,3,4,5,6,7,8,9,10,11]
leds = [Pin(pin, Pin.OUT) for pin in led_pins]

button = Pin(15, Pin.IN, Pin.PULL_UP)
mode = 0   

v_max = 0.5*(20**2) - 0.3*20 + 7
a_max = 20 - 0.3

def show_bar(value, max_value):
    num_leds = int((value / max_value) * len(leds))
    
    for i in range(len(leds)):
        if i < num_leds:
            leds[i].value(1)
        else:
            leds[i].value(0)


t = 0

while t <= 20 :
    if button.value() == 0:
        mode = 1 - mode
        time.sleep(0.3)  

    v = 0.5*(t**2) - 0.3*t + 7
    a = t - 0.3

    if mode == 0:
        print("Time:", t, "Velocity:", v)
        show_bar(v, v_max)
    else:
        print("Time:", t, "Acceleration:", a)
        show_bar(a, a_max)

    time.sleep(1)
    t += 1