需要的东西：一块面包版、一块raspberry pi pico、红绿黄led灯各一颗、220欧电阻3只、若干线

编程软件：thonny

操作系统：deepin 23

结果展示：

 

from machine import Pin
import utime
yellowled=Pin(0,Pin.OUT)#yelow
redled=Pin(2,Pin.OUT)#red
greenled=Pin(1,Pin.OUT)#green
while True:
    redled.value(1)
    yellowled.value(0)
    greenled.value(0)
    utime.sleep(9)
    redled.value(0)
    utime.sleep(0.5)
    redled.value(1)
    utime.sleep(0.5)
    redled.value(0)
    utime.sleep(0.5)
    redled.value(1)
    utime.sleep(0.5)
    redled.value(0)
    
    yellowled.value(1)
    greenled.value(0)
    utime.sleep(0.5)
    yellowled.value(0)
    utime.sleep(0.5)
    yellowled.value(1)
    utime.sleep(0.5)
    yellowled.value(0)
    utime.sleep(0.5)
    yellowled.value(1)
    utime.sleep(0.5)

    greenled.value(9)
    redled.value(0)
    yellowled.value(0)
    utime.sleep(9)
    greenled.value(0)
    utime.sleep(0.5)
    greenled.value(1)
    utime.sleep(0.5)
    greenled.value(0)
    utime.sleep(0.5)
    greenled.value(1)
    utime.sleep(0.5)
    yellowled.value(1)
    greenled.value(0)
    utime.sleep(0.5)
    yellowled.value(0)
    utime.sleep(0.5)
    yellowled.value(1)
    utime.sleep(0.5)
    yellowled.value(0)
    utime.sleep(0.5)
    yellowled.value(1)
    utime.sleep(0.5)