code: def make_grid_transformed(numPix, Mpix2Angle):
      
      x_grid, y_grid = make_grid(numPix, deltapix=1)
      ra_grid, dec_grid = map_coord2pix(x_grid, y_grid, 0, 0, Mpix2Angle)
      return ra_grid, dec_grid
docs: returns grid with linear transformation (deltaPix and rotation)
      :param numPix: number of Pixels
      :param Mpix2Angle: 2-by-2 matrix to mat a pixel to a coordinate
      :return: coordinate grid