Play/Pause with the same button [AVAudioPlayer]

How can I play a sound with an IBAction by pressing on a UIbutton once and pause it by pressing the button again using AVAudioPlayer? Also I want to change the state of that UIButton when the sound is playing and when it's not.

Here's my code:

- (IBAction)Beat
{
    if ([Media2 isPlaying])
    {
        [Media2 pause];
        [Button17 setSelected:NO];
    }

    else
    {
        Path = [[NSBundle mainBundle] pathForResource:@"Beat" ofType:@"mp3"];
        AVAudioPlayer *Media2 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:Path] error:NULL];
        [Media2 setDelegate:self];
        [Media2 play];
        [Button17 setSelected:YES];
    }
}