Consider using imagery to convey the tone of a scene. It’s fine to select a universal image, such as fluffy white clouds or birds chirping to set a happy mood. But you can elevate the scene by picking an image that connects in a specific way to your story or reinforces one of your character’s traits. Then, examine how you can use that same image to depict a change in tone by the ending. For example, if that happy scene ends on a sad note, transform those fluffy white clouds into dark thunderclouds, or have those chirping birds fall silent. Using thoughtful imagery not only reinforces the emotional impact you want your story to have, but also broadens your reader’s experience of the world you’ve created.