Particle = function (pos, img_) {
  this.loc = pos.copy();

  let vx = randomGaussian() * 0.3;
  let vy = randomGaussian() * 0.3 - 1.0;

  this.vel = createVector(vx, vy);
  this.acc = createVector();
  this.lifespan = 100.0;
  this.texture = img_;
}
A simple Particle class, renders the particle as an image