There’s also a few free texture generators and creation applications online. Could simply make an image of a brick texture in Photoshop or Inkscape (free, similar app to PS), and use a white mask to start the middle area of concrete. Then get a concrete texture from the texture generator or other source (Quixel megascans for instance), and add it to the image over the white, opaque middle area. Try to maintain same aspect ratio or at least resolution between programs.