I mixed various greens using combinations of Antwerp blue, French ultramarine blue, new gamboge and raw sienna and painted in the trees on the far side of the lake.

With a dark of blue and burnt sienna I painted in the tree trunks.
Using burnt sienna and a touch of alizarin crimson I put in the rocks on the island.
Using raw sienna and burnt sienna I put in the grasses below the trees.
If you would like more information about ACEO please go to my post on 11 March 2010.
The ACEO shown here is an original watercolour painting using Artist quality Winsor & Newton paint on 140lb. Fabriano 100% cotton, acid free watercolour paper. It is priced at $20.00 and sold unframed.