- Fixed issue #6 and incorrectly positioned gooey circle bug when background dots has greater diameter.

[langyufei]

• Fixed issue #6.
• Fixed a bug where gooey circle indicator won't correctly position itself when background dots(from line) has greater diameter than itself.

[langyufei]

这样就可以做成小圆在大圆里动，像这样。但是这个暂时还不完美，背景里的圆的直径是作者写死的，所以要改直径一定要在init里改才行。