清除屏幕，让海龟回到原位(也是输入标志的命令)
cleanclearbasic命令clearscreencsclearscreen和resetcleartextct清除所有以前的文本条件forwardfdforwardbackbkbackrightrtright左转ltleftpenuppuliftpendownpdputpendownhideturtlehthideturtleshowturtlestturtlehome-home并重复-repeatsplitscreenssgraphicmixedscreenfsfullgraphicsscreentexttsfulltextscreennodrawndfulltextscreen，clearscreenwrap-环绕状态windowstatewindow状态fence状态show-scr
python里面有turtl
pythons实现生日快乐代码的方法:首先按[ctrlr]键，cmd进入命令行，输入pipinstallturtle安装第三方库；
然后打开pythonide，复制相关代码；最后，按快捷键f5保存并执行。
.jpg)
