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

led=machine.Pin(0,machine.Pin.OUT)

led.value(1)
time.sleep(1)
led.value(0)

a=5
print("loop start")
while a>0:
    print("nilai a:",a)
    a-=1
print("loop end")

print("loop start")
for a in range(5,0,-1):
    print("nilai a:",a)
print("loop end")