HW13, Week13,

Serial Call and Response in ASCII
http://www.arduino.cc/en/Tutorial/InputPullupSerial

"ABC"return"ABC"

Serial.print() 指令

接下來, 將按鈕 (pin2) 按下去就 I Love You, 沒按就 I Don't Love You

Example/servo/Sweep
http://www.arduino.cc/en/Tutorial/sweep