function imagick() {
  this.composit = function(param1) { return new _composit(param1, this) }
  this.convert = function(param2) { return new _convert(param2, this) }
}

function _composit(param, parent) {
  // reference to parent object
  this.parentObj = parent;

  this.att = param

  console.log(this.att);

  this.test = function (obj) {
    console.log(obj);

    // return to reference from itself
    return this;
  }

  this.end = function() {
    // return to reference of parent object
    return this.parentObj;
  }
}

function _convert(param, parent) {
  // reference to parent object
  this.parentObj = parent;

  // saving param
  this.att = param;

  // printing att
  console.log(this.att);

  this.resize = function (obj) {
    console.log(obj);

    // return to reference from itself
    return this;
  }

  this.end = function() {
    // return to reference of parent object
    return this.parentObj;
  }
}


var im = new imagick();

im.composit("test1").test("test2").end().composit("test3").test("test4");
im.convert("blah").resize("blub").end();