Watercolor Homework - Foggy Hills in Blue

This scene uses a graduated wash going from an Viridian (aqua-blue) to a truer blue.
It is a Wet on Wet application. meaning the artist wets the whole paper surface and then applies the paint; then keeps thinning the color down the whole page with successive and slightly overlapping brush strokes of water while the paper is still wet.
The first wash is then allowed to dry and the flat brush is used to wet the paper below the first pencil markings and apply the next wash which has more blue added to it; continuing to thin the color down the paper with water.
It dries and the next wash is continued at the next pencil mark, applying a still more blue tinted color and thinning with watered brush strokes until all the washes have been finished.
Then "lifting" of the some of the color in the last wash with a clean wet brush achieves the wavy movement of the "fog".
Lastly the trees of solid blue are added as accents with a Wet on Dry brush stroke.