If this happens, hover the mouse pointer over the red circle to display the error message, make the needed correction, and save the file again.
如果出现了此情况，请将鼠标指针悬停在红色圆圈上方以显示错误消息，然后进行必要的更正并再次保存文件。
2
Errors are flagged by a red circle with an "X" that appears beside the line with the error.
将在错误代码行旁边使用带“X”的红色圆圈对错误进行标记。
3
It turns out that accurately placing text aligned vertically and horizontally around the perimeter of a circle is somewhat complicated, so a simple trial-and-error approach is shown on lines 80-107.