glClearColor( 0.2f, 0.0f, 0.0f, 1.0f );
glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
glClearColor( 0.2f, 0.0f, 0.0f, 1.0f );
glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
glBindFramebuffer( GL_FRAMEBUFFER, 0 );