text: class Circle{
      draw(){
          console.log('draw..')
      }
  }
  
  class Decorator{
      constructor(circle){
          this.circle = circle
      }
      draw(){
          this.circle.draw()
          this.setRedBorader(this.circle)
      }
      setRedBorader(circle){
          console.log('set red..');
      }
  }
  
  let circle = new Circle()
  circle.draw()
  
  let d = new Decorator(circle)
  d.draw()