Using the same instrument, picture the second elements’ layer of white color.



Having this tool represent the fir-tree ornaments. You may minimize or enlarge the fir-tree balls, using Free Transform option.
Copy the fir-tree and place it the same way it is indicated below.



Pass to picturing now the snowflakes.



You may find it here, in the CustomShape menu.



The color code must be C7F0FD.
Represent now the snow.



Applying the known instrument, create a figure like in this picture.



Then copy it arbitrarily on the entire sky, minimizing or enlarging some of the figures. All that you’ve done, copy and move it to the lowest part. Change the Opacity of 70% on each layer.



The final result!