Minim Waveform problem

Hi all !

i've been coding in processing for a few month now and i'm starting to use minim to add sound in my sketches yet i'm totally new to this library and afters hours of strugling i can't find a way to solve my problem: here is my basic code

import ddf.minim.*;
Minim minim;
AudioPlayer groove;
float x, y, a, b, c, d, z;
PFont police;
PFont polisse;
String DISASTERPEACE;
String HLD;

void setup() {
  size(600, 600);
  minim = new Minim(this);
  groove = minim.loadFile("groove.mp3", 1024);
  groove.loop();
  background(0);
  textAlign(CENTER);
  emissive(0, 26, 51);
 police=createFont("drifter.ttf", 32);
 polisse=createFont("DF.ttf", 25);
   textFont(police);
 HLD="Hyper Light Drifter";
  DISASTERPEACE="DISASTERPEACE";
  smooth();
  stroke(random(0, 255), random(0, 255), random(0, 255));

  for (int i=0; i<40; i++)
  {
    fill(random(0, 255), random(0, 255), random(0, 255));
    ellipse(x, y, z, z);
    ellipse(a, b, z, z);
    ellipse(c, d, z, z);
    line(x, y, a, b);
    line(x, y, c, d);
    line(c, d, a, b);
    x=random(0, 600);
    y=x+20;
  a=x-20;
    b=random(0, 600);
   c=b+20;
    d=b-20;
    z=3;
  }
  fill(255);
    textSize(12);
  text(HLD, 300, 275);
   textSize(30);
  text(DISASTERPEACE, 300, 313);
  //save("ESSAIS10.jpg");
}

so i simply want the line to react to the playing music, i've read a ton of minim releated stuff and saw all the exemples about it and yet i can't manage to make thoose line vibrate to the music

i've tried many things but nothing worked.

thanks for your help