This fire engine is on its way to a job, and its siren and flashing lights have drawn a crowd of children along the side of the road. They are cheering, waving and jumping up and down, eager to see the truck in action. To capture the feeling of action in this scene, I would choose colors that evoke energy and excitement. A bright red for the fire engine and a lighter, cheerful yellow for the children could be a good starting point. To bring the scene to life, I would also add shades of blue, green, purple and magenta to the colors. This would create a feeling of movement in the picture, and the resulting image would be quite vibrant.