JavaScript 객체 안에 함수 만들기

const duckie = {
  name: '오리',
  sound: '꽥꽥',
  poop: '부르륵',
  say: function say(){
    console.log(this.sound);
  },
  dung: function dung(){
    console.log(this.poop);
  }
};

duckie.say();
duckie.dung();