constructor(x, y, z, index){

    this.opos = createVector(x, y, z);

    this.pos = createVector(x, y, z);

    this.vel = createVector(1, 0, 0);

    this.push = createVector(1, 0, 0);

    stroke(0);

    strokeWeight(map(this.pos.z, - depth, depth, 10, 0));

    this.index = index;

    this.c = floor(this.index % cols.length);

    this.col = color(cols[this.c]);

    this.scale = 1000;

    this.history = [];

    this.i = 0;

    this.lines = 4;

    // this.tick = 0;

  }

  update(){

    this.nf = map(noise(this.pos.x / this.scale, this.pos.y / this.scale, this.pos.z / this.scale), 0, 1, -1, 1);

    this.nf2 = map(noise(this.pos.y / this.scale, this.pos.z / this.scale, this.pos.x / this.scale), 0, 1, -1, 1);

    if(this.push.mag() > 150 && this.push.mag() < 175){

      this.vel = p5.Vector.fromAngles(this.nf * TWO_PI * 2, this.nf2 * TWO_PI, 1);

    }

    this.vel = p5.Vector.fromAngles(this.nf * TWO_PI * 2, this.nf2 * TWO_PI, 1);

    // this.push = p5.Vector.sub(this.pos, avoid);

    // if(this.push.mag() < 150){

    //   this.vel.add(this.push);

    // }

    // if(this.push.mag() > 175){

    //   this.push.mult(-1);

    //   this.vel.add(this.push);

    // }

    this.vel.setMag(4);

    strokeWeight(2);

    // this.pos.y = this.nf * height;

    this.pos.add(this.vel);

    if(this.pos.x < - width){ 

      this.pos.x  = random(-width, width);

      this.pos.y  = random(-height, height);

      this.pos.z  = random(-depth, depth);

      this.history.splice(0, this.lines);

    }

    if(this.pos.y < - height){ 

      this.pos.x  = random(-width, width);

      this.pos.y  = random(-height, height);

      this.pos.z  = random(-depth, depth);

      this.history.splice(0, this.lines);

    }

    if(this.pos.z < - depth){ 

      this.pos.x  = random(-width, width);

      this.pos.y  = random(-height, height);

      this.pos.z  = random(-depth, depth);

      this.history.splice(0, this.lines);

    }

    if(this.pos.x > width){ 

      this.pos.x  = random(-width, width);

      this.pos.y  = random(-height, height);

      this.pos.z  = random(-depth, depth);

      this.history.splice(0, this.lines);

    }

    if(this.pos.y > height){ 

      this.pos.x  = random(-width, width);

      this.pos.y  = random(-height, height);

      this.pos.z  = random(-depth, depth);

      this.history.splice(0, this.lines);

    }

    if(this.pos.z > depth){ 

      this.pos.x  = random(-width, width);

      this.pos.y  = random(-height, height);

      this.pos.z  = random(-depth, depth);

      this.history.splice(0, this.lines);

    }

    if(frameCount % 1 == 0){

      this.history[this.history.length] = createVector(this.pos.x, this.pos.y, this.pos.z);

    }

    if(this.history.length > this.lines & frameCount % 1 == 0){

      this.history.splice(0, 1);

    }

    if(this.history.length > 2){

      for(this.i = 0; this.i < this.history.length - 1; this.i++){

        stroke(this.col);

        line(this.history[this.i + 1].x, this.history[this.i + 1].y, this.history[this.i + 1].z, this.history[this.i].x, this.history[this.i].y, this.history[this.i].z);

      }

    }

    // point(this.pos.x, this.pos.y, this.pos.z)

  }

}