js实现转盘抽奖

<div class="box">
            <div class="div2">短裙</div>
            <div class="div3">口红</div>
            <div class="div4">草莓</div>
            <div class="div5">西瓜</div>
            <div class="div6">奶茶</div>
            <div class="div7">美甲</div>
            <div class="div8">谢谢参与</div>
            <div class="div9">苹果13</div>
            <strong class="button"> 点击抽奖</strong>
        </div>

* {
                margin: 0;
                padding: 0;
            }
            .box {
                width: 340px;
                height: 340px;
                border: 1px #00FFFF solid;
                position: relative;
                margin: 100px;
            }
            .box div {
                width: 100px;
                height: 100px;
                background-color: royalblue;
                text-align: center;
                line-height: 100px;
            }
            .div2 {
                position: absolute;
                top: 10px;
                left: 10px;
            }
            .div3 {
                position: absolute;
                top: 10px;
                left: 120px;
            }
            .div4 {
                position: absolute;
                top: 10px;
                left: 230px;
            }
            .div5 {
                position: absolute;
                top: 120px;
                left: 230px;
            }
            .div6 {
                position: absolute;
                top: 230px;
                left: 230px;
            }
            .div7 {
                position: absolute;
                top: 230px;
                left: 120px;
            }
            .div8 {
                position: absolute;
                top: 230px;
                left: 10px;
            }
            .div9 {
                position: absolute;
                top: 120px;
                left: 10px;
            }
            .button {
                width: 100px;
                height: 100px;
                background-color: #62c6a3;
                position: absolute;
                text-align: center;
                line-height: 100px;
                top: 120px;
                left: 120px;
            }

let button = document.getElementsByClassName('button')[0];
            let box = document.getElementsByClassName('box')[0];
            let pirze = box.getElementsByTagName('div');
            let k = 0;
            let time = 500;
            let count = 0;
            let int;
            let rom = 0;
            button.onclick = eve;
            function eve() {
                pirze[k].style.background = "pink";
                int = setInterval(pu, time)
                rom = Math.floor(Math.random() * pirze.length);
                button.onclick = null;
            }
            function pu() {
                if (k < pirze.length - 1) {
                    k++;
                    pirze[k - 1].style.background = "royalblue";
                    pirze[k].style.background = "pink";
                } else {
                    k = 0;
                    count++;
                    pirze[pirze.length - 1].style.background = "royalblue";
                    pirze[k].style.background = "pink";
                }
                if (count <= 5) {
                    if (time <= 100) {
                        time = 100;
                    } else {
                        time -= 20;
                    }
                } else {
                    if (time >= 500) {
                        time = 500;
                    } else {
                        time += 20;
                    }
                }
                if (count > 7 && rom == k) {
                    clearInterval(int);
                    count = 0;
                    rom = 0;
                    time = 500;
                    button.onclick = eve;
                    let text = pirze[k].innerHTML;
                    setTimeout(function(){
                        alert("恭喜您获得：" + text);
                    },300)
                }else{
                    clearInterval(int);
                    int = setInterval(pu, time)
                }
            }