Now that your hardware is ready, you'll need to program Arduino to send the proper control signals. To control this shield, you'll need to download a library from Adafruit.
The library for the motor shield can be downloaded from https://learn.adafruit.com/adafruit-16-channel-pwm-slash-servo-shield/using-the-adafruit-library.
Once you have downloaded the library, you'll need to rename it to install it into the IDE. Look for the
Adafruit-PWM-Servo-Driver-Library-master.zip file in the directory you downloaded the file from, and unzip this to the directory where your Arduino library is stored, as shown in the following screenshot:
Adafruit-PWM-Servo-Driver-Library-master directory should now ...