Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
积木“当背景换成( )”是事件类别中的帽子积木。当且仅当背景换成选定的背景,它才会运行它下面连接的积木。
注意:这个积木本身不能更换背景。如果想知道如何更换背景,请参考这篇文章。
在这个程序中,每当点击绿旗,我们就把背景换成列表中的下一个背景。只有当背景变为“创益编程”,这两个角色就分别向左转、向右转。