import machine
import uasyncio
import utime
import queue
import random
 
# Settings
led = machine.Pin('LED', machine.Pin.OUT)
 
async def blink(q):
    delay_ms = 0
    while True:
        if not q.empty():
            delay_ms = await q.get()
        led.toggle()
        await uasyncio.sleep_ms(delay_ms)
 
# Coroutine: entry point for asyncio program
async def main():
 
    # Queue for passing messages
    q = queue.Queue()
    # Start coroutine as a task and immediately return
    uasyncio.create_task(blink(q))
 
    # Main loop
    while True:
        await q.put(int(1000*random.random()))
        await uasyncio.sleep_ms(1000)
 
# Start event loop and run entry point coroutine
uasyncio.run(main())