import time
time.sleep(0.1) # Wait for USB to become ready

from machine import ADC,Pin

pot=ADC(Pin(26))
led=Pin(4,Pin.OUT)

while 1:
    led.toggle()
    val=pot.read_u16()
    delay=0.1+2.0*(val/65535.00)
    print("delay is:",delay)
    time.sleep(delay)