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

from machine import Pin
led=(Pin(2,Pin.OUT),Pin(3,Pin.OUT),
     Pin(4,Pin.OUT),Pin(5,Pin.OUT))
pattern=((1,0,0,0),(0,1,0,0),(0,0,1,0),
         (0,0,0,1))        
pattern2=((0,0,1,1),(1,1,0,0))
for i in range(4):
    led[i].value(1)
time.sleep(1)
for i in range(4):
    led[i].value(0)
time.sleep(1)
for i in led:
    i.value(1)

while 1:
    for k in range(5):
        for j in range (4):
            for i in range(4):
                led[i].value(pattern[j][i])
            time.sleep(0.5)
    for k in range(5):
        for j in range (2):
            for i in range(4):
                led[i].value(pattern2[j][i])
            time.sleep(0.5)