diff --git a/index.html b/index.html
index 2ddb06a..af94e44 100644
--- a/index.html
+++ b/index.html
@@ -49,7 +49,7 @@
             <div class="row"id="pic_scale_fun">
                 <div class="row_Text title">趣味功能</div>
                 <div class="scale_size_but row" onclick="scale_size_ma()">马赛克化</div>
-                <div class="scale_size_but row" onclick="animatePic()" id="ani_but">动画模式</div>
+                <div class="scale_size_but row" onclick="animatePic()" id="ani_but">动画模式<br>（很慢！）</div>
             </div>
             <div class="row down" onclick="saveImg()">下载</div>
         </div>
diff --git a/main.js b/main.js
index 3acf30a..09797ad 100644
--- a/main.js
+++ b/main.js
@@ -255,7 +255,6 @@ async function scale(index, scale_x, scale_y) {
     if (ani_mode) {
         document.getElementById("c2").style.display = "flex"
         document.getElementById("c2").append(canvas2);
-        document.getElementById("c1").style['justify-content'] = "center"
         document.getElementById("c2").style['justify-content'] = "center"
 
         document.getElementById("c1").style.width = 70 * vw / (scale_x + 1) + "px"
@@ -283,8 +282,9 @@ async function scale(index, scale_x, scale_y) {
             alpha = datas[Math.floor(i / scale_y)][Math.floor(j / scale_x)][3];
             ctx.fillStyle = "rgba(" + red + "," + green + "," + blue + "," + alpha + ")";
             ctx.fillRect(j, i, 1, 1)
+            if (ani_mode) if (j % 100 == 0) await sleep(1);
         }
-        await sleep(10);
+        if (ani_mode) if (i % 2 == 0) await sleep(5);
     }
 
     let imgdata = canvas2.toDataURL();