Inspired by Clayton's https://community.wolfram.com/groups/-/m/t/1614126

Use Clayton's code in the above link and set trigonometric function the shadows for phase shift in each frame of the iteration, you can create the gif to control your breathe rythem.

anim1 = With[{\[Delta] = 1/12, 
    cols = RGBColor /@ {"#07090e", "#2bb3c0", "#faf7f2"}}, 
   Table[Graphics[Reverse[Table[s = Mod[r + i, 3/2];
         {Blend[cols, LogisticSigmoid[8 (s - 1/2)]], 
          Polygon@Map[
            RotationTransform[-Sin[s*\[Pi]*3*r]]@*
             RotationTransform[3*r*\[Pi]], star52[2*s], {2}]}, {i, 0, 
          3/2 - #, #}]] &[\[Delta]], PlotRange -> 1, ImageSize -> 540,
      Background -> cols[[-1]]], {r, 0, \[Delta], 0.004}]];

And

   anim2 = With[{\[Delta] = 1/12, 
    cols = RGBColor /@ {"#07090e", "#2bb3c0", "#faf7f2"}}, 
   Table[Graphics[Reverse[Table[s = Mod[r + i, 3/2];
         {Blend[cols, LogisticSigmoid[8 (s - 1/2)]], 
          Polygon@Map[
            RotationTransform[Sin[s*\[Pi]*3*r]]@*
             RotationTransform[-3*r*\[Pi]], star52[2*s], {2}]}, {i, 0,
           3/2 - #, #}]] &[\[Delta]], PlotRange -> 1, 
     ImageSize -> 540, Background -> cols[[-1]]], {r, 0, \[Delta], 
     0.004}]];

Visualize by

ListAnimate[anim[0]~Join~Reverse@anim[0]~Join~anim2~Join~Reverse[anim2]]