diff --git a/index.html b/index.html
index 26a00e8acffc8f65698395cf8be3d42671edd57f..cd74d2d66590ad8a6f905c055c6422479ebb22cd 100644
--- a/index.html
+++ b/index.html
@@ -27,7 +27,7 @@
     <div id="blocklyArea"></div>
     <div id="blocklyDiv" style="width: 80%;height:100%;float:left;"></div>
     <div style="height:100%;width:20%;float:right;">
-      <div style="height:100%;width:100%;overflow-y:scroll;overflow-x:scroll;white-space: nowrap;border:3px dashed #AAAAAA;" id="code" onclick="fcolored_egg()"></div>
+      <div style="height:100%;width:100%;overflow-y:scroll;overflow-x:scroll;white-space: nowrap;border:4px dashed #AAAAAA;" id="code" onclick="fcolored_egg()"></div>
     </div>
     <xml xmlns="https://developers.google.com/blockly/xml" id="toolbox" style="display: none">
       <category name="循环" css-path="./static/boxy/svg/cycle.svg">