from machine import Pin, Timer
#Initialize the onboard LED as ouput
led = Pin(2, Pin.OUT)
#Initialize timer_one. Used for toggeling the LED
timer_one = Timer(0)
#Initialize timer_two. Used for changing the State
timer_two = Timer(1)
#Initialize state variable. Used for changing the State
state = 1
toggle = 1
def BlinkLED(timer_one):
 global toggle
 if toggle == 1:
  led.value(0)
  toggle = 0
 else:
  led.value(1)
  toggle = 1
 
def ChangeState(timer_two):
 global state
 
 if state == 1:
 # 100mS Timer initialization 
  timer_one.init(freq=10, mode=Timer.PERIODIC, callback=BlinkLED)
  state = state+1
 elif state == 2:
 # 250mS Timer initialization
  timer_one.init(freq=4, mode=Timer.PERIODIC, callback=BlinkLED)
  state = state+1
 elif state == 3:
 # 1000mS Timer initialization
  timer_one.init(freq=1, mode=Timer.PERIODIC, callback=BlinkLED)
  state = 1
 else:
 # Default state
 # 100mS Timer initialization
  state = 1
  timer_one.init(freq=10, mode=Timer.PERIODIC, callback=BlinkLED)
 
# Initialize the timer one for first time
timer_one.init(freq=10, mode=Timer.PERIODIC, callback=BlinkLED)
state = state+1
#Subcequent timer states for 20 seconds interval
timer_two.init(freq=0.05, mode=Timer.PERIODIC, callback=ChangeState)