In the center of this coloring page is a wide, dark valley. On the left of the valley is a hill which is capped by a grove of trees. On the right side of the valley lies a red and white fire extinguisher. You could start by coloring the valley a deep black, blue or green shade, or a combination of those colors. You could make the hill green and the trees a mix of browns and greens. The fire extinguisher should have a bright red top and white bottom, with the red and white divided by a thin black line to add contrast. After this, you could draw some details like rocks and plants, as well as a few birds or clouds to make the entire page look cohesive.