As for the pins, the UNO features 14 digital pins for both input and output use, six analog pins for input only, three ground (GND ... one of the built-in examples in the Arduino IDE.

Connecting the display pins directly to Arduino I/O pins is not a good practice. For testing purpose only one 330 Ohm resistor (R2) is added between ground rail (0V) and the common cathode pins (3 & 8 ...

SparkFun or Adafruit also includes specific example tutorials, complete with wirings and code, that demonstrate how to use the sensor modules with your Arduino ... Another common cause of shorts ...