Double tap spotify for previous track

[Ashvir16]

I want to be able to double-tap spotify for previous track, this is what I have now, anyone know how to do it?

{
    "type": "appleScriptTitledButton",
    "source": {
      "inline":
        "if application \"Spotify.app\" is running then\rtell application \"Spotify.app\"\rif player state is playing then\rreturn (get artist of current track) & \" – \" & (get name of current track)\relse\rreturn \" Tap to Play ||  \"\rend if\rend tell\rend if\rreturn \"\"\r"
    },
    "action": "appleScript",
    "actionAppleScript": {
      "inline":
        "if application \"Spotify.app\" is running then\rtell application \"Spotify.app\"\rif player state is playing then\rpause track\relse\rplay\rend if\rend tell\rend if\r"
    },
    "longAction": "appleScript",
    "longActionAppleScript": {
      "inline": 
        "if application \"Spotify.app\" is running then\rtell application \"Spotify.app\"\rif player state is playing then\rnext track\rend if\rend tell\rend if\r"
      },
      
    "refreshInterval": 1,
    "image": {
      "base64":
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    }
    },