Music Play/Pause Button

Hey i want a Play/Pause button in my Visualizer can you help me??

import ddf.minim.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
import ddf.minim.signals.*;
import ddf.minim.spi.*;
import ddf.minim.ugens.*;

PImage hintergrund;

Minim minim;
AudioPlayer Player;
FFT fft;
int w;
int farbe;


void setup()
{
  size(500,300,P3D);
  minim = new Minim(this);
  Player = minim.loadFile("bla.mp3"); // Spielt die Mp3 datei ab
  Player.loop(); // Wiederholt den aktuellen Song
  fft = new FFT(Player.bufferSize(), Player.sampleRate());
  fft.logAverages(60, 7);
  stroke(255);
  w = width/fft.avgSize();
  strokeWeight(w);
  strokeCap(SQUARE);
  farbe = 0;

}

void draw()
{
  hintergrund = loadImage("hintergrund.jpg");
  image(hintergrund,0,0);

  fft.forward(Player.mix);

  colorMode(HSB);
  stroke(farbe, 255, 255);
  colorMode(RGB);

  for(int i = 0; i < fft.avgSize(); i++){
    line((i * w)*3, height/1.1, (i * w)*3, height/1.1 - fft.getAvg(i) * 0.5);

}

  farbe += 5;
  if( farbe > 255)
  {
    farbe = 0;
  }
}

This is atm my Code also i would donate a few euro if you can help me :)