cc.TweenAction 改寫出來還是有問題 請教各位大神~

Creator 2.x
#1

各位好, 原本有一個簡單的跑馬燈 想要改寫成TweenAction 卻一直出現問題:

var len = list.length-1;
this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label").getComponent(cc.Label).string = list[len].title+': '+list[len].text;
 
var txt = this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label");
this.defaultPos = txt.x;
var action = cc.moveTo((txt.width/200), cc.v2((txt.x - (txt.width + txt.width/2)), txt.y));
var reset = cc.callFunc(function() {
    txt.x = this.defaultPos; // reset where txt was
    len --;
 
    this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label").getComponent(cc.Label).string = list[len].title+': '+list[len].text;
    if(len < 1){
        len = list.length;
    }
},this); 
var seq = cc.repeatForever(cc.sequence(action, cc.delayTime(0.5) ,reset));
txt.runAction(seq);

這是改寫後的

var len = list.length-1;
this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label").getComponent(cc.Label).string = list[len].title+': '+list[len].text;
var txt = this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label");
this.defaultPos = txt.x;
let action = cc.tween().to((txt.width/200), cc.v2((txt.x - (txt.width + txt.width/2)), txt.y));
var reset = cc.callFunc(function() {
txt.x = this.defaultPos;
len --;
this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label").getComponent(cc.Label).string = list[len].title+': '+list[len].text;
    if(len < 1){
        len = list.length;
    }
},this); 
cc.tween(txt)
    .repeat(
    cc.tween().then(action)
    .delay(0.5)
    .then(reset);
)
.start()

請問哪邊寫錯了呢? 謝謝

#2 
    let action = cc.tween().to((txt.width/200), {position: cc.v2(txt.x - (txt.width + txt.width/2), txt.y)});
#3

#5

已改寫完成

let txt = this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label");
            this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label").getComponent(cc.Label).string = list[len].title+': '+list[len].text;
            console.log(txt.width)
            cc.tween(txt)
            .repeatForever(
                cc.tween().to((txt.width/200), {position: cc.v2(txt.x - (txt.width + txt.width*2/3), txt.y)})
                .delay(1)
                .call(() => { 
                    cc.log('reset')
                    txt.x = 0;
                    len --;
                    this.node.getChildByName("marquee").getChildByName("mask").getChildByName("label").getComponent(cc.Label).string = list[len].title+': '+list[len].text;
                    console.log(txt.width)
                    if(len < 1){
                        len = list.length;
                    }
                })    
            )
            .start()