# Crazy flashing window

**URL:** <https://discourse.glfw.org/t/crazy-flashing-window/114>\
**Category:** support\
**Created:** [December 28, 2014, 5:20pm UTC](https://discourse.glfw.org/t/crazy-flashing-window/114 "2014-12-28T17:20:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [December 28, 2014, 5:20pm UTC](https://discourse.glfw.org/t/crazy-flashing-window/114/1 "2014-12-28T17:20:42Z")

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**[eskimopie](https://sourceforge.net/u/eskimopie/)** wrote on [Sunday, December 28, 2014](https://sourceforge.net/p/glfw/discussion/247562/thread/0ea6f9c0/#a919):

Hi GLFW community

I’m a newby and have completed the following video

[![](https://i.ytimg.com/vi/shpdt6hCsT4/maxresdefault.jpg "GLFW 3 Library in Mac 10.7.5 (settings)") ](https://www.youtube.com/watch?v=shpdt6hCsT4)

however, my hello world window looked like this:  
 ![Explore eskimo___](https://oi1303.photobucket.com/albums/ag156/eskimo___/screenshot_124_zps890ae561.jpg)

any ideas where I’ve gone wrong? Im using osx yosemite with the latest GLFW

Thanks