Method OnUserUpdate

olcExampleProgram.cpp:19–26

	}

	bool OnUserUpdate(float fElapsedTime) override
	{
		// called once per frame
		for (int x = 0; x < ScreenWidth(); x++)
			for (int y = 0; y < ScreenHeight(); y++)
				Draw(x, y, olc::Pixel(rand() % 255, rand() % 255, rand()% 255));	
		return true;
	}
};