In the Objects palette, click on the Gray Triangle or the word Layers to gain access to the Layers section (10).   Click on the New button to create a new layer. 

You should have already downloaded the 10 nozzles for this tutorial, if not, do so now.  Press Ctrl + L and load the Short-4 grass nozzle. Those of you who may not be familiar with the differences in loading a nozzle and loading a nozzle library should visit this link. Set the Size: to around 50%.  Beginning at the bottom of the sky paint in some grass so it covers a little sky and about 1/3^rd of the canvas.  Change the Size: to 90% and paint to the bottom of the canvas.  You will have something that looks like this (11).