Your contribution cannot be approved because it does not follow the Utopian Rules.

This contribution cannot be approved because:

• You should show a proper repository for the project you contribute, which means an official GitHub repository, an official GitHub mirror, or a whitelisted unofficial GitHub repository. Since there is no proper repository for C, general contributions on C are not accepted. Even if this is also an OpenGL tutorial, you could have provide a repository for that, but since OpenGL is an API, not an implementation, there is no proper repository for OpenGL too.

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