anchor.diff:  
         let layer = new Konva.Layer();
         //Campo magnetico
  -      let Bmag = 60.22; //Teslas
  +      let Bmag = 6.622; //Teslas
         let Bdir = "cruz"; //Hacia dentro de la pantalla. "punto", hacia fuera de la pantalla.
  +      let Fm = [0, 0]; //Fuerza magnetica
   
         let label = new Konva.Label({
             x: 180,
  
positive.code:           let yi = label.y();
            let yf = label.y() + label.getHeight();
  
            if ((part.getPart().x() >= xi && part.getPart().x() <= xf) && (part.getPart().y() >= yi && part.getPart().y() <= yf)) {
                //Esta en el campo magnetico
                part.getPart().x(part.getPart().x() + (part.getSpeed()[0] + 2)); //Prueba
            }
            else {
                //no lo esta
                part.getPart().x(part.getPart().x() + part.getSpeed()[0]); //Prueba
            }
  
            if (part.getPart().x() >= 1190 || part.getPart().y() >= 490 || part.getPart().x() <= 10 || part.getPart().y() <= 10) {
                anim.stop();
            }
  
  
            layer.draw();
  
        });
  
        /*** FUNCTIONS ***/
        function startAnim() {
            anim.start();
        }
  
negative.code:                   draggable: true
                });
                this.velocity = [0.5, 0];
                this.mass = 0.009;
                this.charge = 0.167;
            }
  
            getPart() {
                return this.particle;
            }
  
            getCharge() {
                return this.charge;
            }
  
            getMass() {
                return this.mass;
            }
            getSpeed() {
                return this.velocity;
            }
  
  
            //Dibujar
            draw() {
  