Process 

I finished the blink the leds exercises easily because I can find that I only need to make a change of the blink time and write simple for loops. I spent more time setting up different command to call the leds' state during the connected led exercises, because I need to look up additional functions to define the variable through the command. At last, I was able to understand each step of connecting the circuit and the meaning of code, which is very helpful for me to continue learning more skills.