from machine import Pin
from time import sleep_ms, ticks_ms

clk = Pin(23, Pin.OUT, value = 0)
delay_time = 1000

while True:
    clk.value(1)
    print(f"CLK: {clk.value()}")
    sleep_ms(delay_time)
    clk.value(0)
    print(f"CLK: {clk.value()}")
    sleep_ms(delay_time)