Trying a small project.

Hello all.
I need you help.
I have 1uno and 1 dfplayer.
i have made a mp3 player that work fine.
Now for my new project i want to play an mp3 from dthe micro sd of dfplayer when i push one button.
example.
button one pressed : play 0001.mp3
button 2 pressed : play 0002.mp3
....
like this video.video

i need this for 3or 4 button.
Im forget i have read a lot and don t see if it s possible with an uno and dfplayer.
can you help me for plan a code?
thanks a lot.

You may not need UNO

  1. AD KEY Mode
    We use the AD module keys, instead of the traditional method of matrix keyboard connection, it is to take advantage of increasingly powerful MCU AD functionality, Our module default configuration 2 AD port, 20 key resistance distribution.

Refer diagram