Firstly, this tutorial will easily assist you creating a light checkerboard background ‘https://youtu.be/qVxcc31Whv8I’ , next, I would create the diagonal light bars in either Adobe Illustrator or Photoshop, when you export them from either illustrator or Photoshop, you could utilise blending modes for the effects of the diagonal bars. Finally, I would utilise Video Copilot’s Optical Flares 3rd party plugin for light blue flares.