text: class Vector
  {
      constructor(r, seta)
      {
          this.r = r;
          this.seta = seta;
          
          this.x = cos(this.seta)*this.r;
          this.y = sin(this.seta)*this.r;
      }
  
      draw()
      {
          noFill();
          stroke("yellow");
          strokeWeight(2);
          point(this.x, this.y);
      }
  }