P5 code into Java + help in understanding (artwork)

p5.js Coding Questions
7 
float f, t;
float W, H;
PImage shark;
int ang = 0;
int cang = 0.01;

float shark,
    particles = [];

float pixelStep = 10;

var x=0
var y=0

void setup () {
  size(1000, 1000);
  W=width;
  H=height;
  stroke(#A08447);
  f=2;
  strokeWeight(f);
  shark = loadImage("shark_smal.png");
  
  for(int ang = 0; x < shark.width; x += pixelStep){
    for(int cang = 0; y < shark.height; y += pixelStep){
      particles.push(new Particle(x+(width-shark.width)/2,y+(height-shark.height)/4,shark.get(x,y)));
    }
  }
}

void draw () {
  clear();
  background(#766132);
  
  //SAND BACKGROUND FUNCTION NOTHING CHANGED
  t=map(sin((f+=0.01)), -1, 1, 60, 200);
  float TAU=TWO_PI;
  for (int y=0; y<H; y+=3) {
    for (int x=0; x<W; x+=3) {
      float  r=noise(x/W, y/H - f) *t;
      point(cos(r)*TAU+x, sin(r)*TAU+y);
      
    }
  }

//PLACEMENT OF THE IMAGE IN THE FRAME
  image(shark, 270, 200
  
// HERE THE EFFECT SHOULD BE ADDED TO THE IMAGE

  degrees();
  for (int i=0; i<9999; i++){
      x+=5
  if (x>width) {
    y+=5;x=0
  }
  if (y>height) {
    y=0;x=0
  } 
}

  
  for(let particle of particles){

    particle.draw();
    particle.pos.add(particle.vel);
    particle.vel.div(1.1);
    particle.vel.add(PVector.sub(particle.target,particle.pos).div(20));
    const d = dist(particle.pos.x,particle.pos.y,x,y);
    particle.vel.x += (particle.pos.x - x) / d;
    particle.vel.y += (particle.pos.y - y) / d;
  }
  
}

class Particle {
  constructor(x,y,color){
    this.col = color;
    this.pos = new PVector(x,y);
    this.vel = new PVector();
    this.target = this.pos.copy();
  }
  
  draw(){
    fill(this.col);
    ellipse(this.pos.x,this.pos.y,pixelStep,pixelStep);
  }  
}
}

Yes, that’s right. I have not shown how I try. Maybe because I’m a bit embarrassed. So at the moment I’m trying it like this. However, I only get error messages and it doesn’t really work. I would also be happy with a simpler solution that lets the image of the shark do something. I just haven’t come across anything yet that could help me.