All you need is
2(or more) 7 segment displays
And a breadboard/ 3.5 power supply!
Also the diagram is just for the "COM" pin that is connected to the GND on the breadboard.
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Step 1: THE BUTTON
First connect all the negative pins to a row on the board,
Then get another wire and connect it to the switch.
Step 2: POSITIVE
Now take a few wires and connect the positive to 1 of the pins on the display so something turns on,
Now trial and fail until you get the digital you want!
Step 3: DONE
Now you are done and if you wired it right it will light up!