4-digit display shield build on the Proto board.
See Fig.1.

Parts List:

1. Arduino Uno R3

2.HiLetgo R3 Proto Shield Proto Expansion Board

3. 4-digit 7-segment LED display module

    Model: 5641AS ,  Size: 0.56 x 1.98 inch ,  Emitting color: Red
    Mode: Common-Cathode (CC) ,  Digit: 4-Digit
    Category: LED 7-Segment Display

4. Resistors 1 k   x 4