from machine import Pin
import utime
import random

led = [Pin(p, Pin.OUT) for p in range(1, 11)]

btn = Pin(15, Pin.IN, Pin.PULL_DOWN)

def v(t):
    return 0.5*t - 0.3*t + 7

def a(t):
    return t - 0.3

def showLedGraph(val, led):
    for i in range(val):
        led[i].value(1)
    
    utime.sleep(2)

    for i in range(val):
        led[i].value(0)

prev = 0
p = 1
while True:
    curr = btn.value()
    val = 0
    if curr == 1 and prev == 0:
        if (p == 1):
            p = 0
            val = v(t)
        else:
            p = 1
            val = a(t)
    showLedGraph(val, led)
    prev = curr