Two quick sketches.

Home is behind, the world ahead,
And there are many paths to tread
Through shadows to the edge of night,
Until the stars are all alight.
Then world behind and home ahead,
We'll wander back to home and bed.
Mist and twilight, cloud and shade,
Away shall fade! Away shall fade!
Fire and lamp, and meat and bread,
And to bed! And then to bed!

Treebeard summons the Ents, who emerge out of the forest. They attack Isengard and flood it.