
Now. Copy brush layer(drag a layer onto a 'new layer' symbol) and apply the gaussian blur, Filter > blur > gaussian blur.. and then reduce opacity to 40.

Create one layer.. name the layer as "color". on layer color pick a brush (B) and paint the layer with any different colour. Here I use a basic brush with soft mechanical size 150px. And I choose blue & pink color. (2 different color, 1 layer!)

After that. Create a new layer. (And press D). Go to Filter > Render > Clouds. Then Filter > Blur > Gaussian Blur (10px). Set the blending mode to 'vivid light' and reduce opacity to 50
Finally, on layer 'color', set the blending mode to 'overlay' and wallllap!! the result.

