Meg and I enjoyed the Fourth of July at her family reunion at Big Cedar resort. The resort is located on an arm of Table Rock lake in southern Missouri. Many, many boats anchored in the arm to enjoy the fireworks display. Their lights made a great collage of colors. I started with the boat lights in focus, and then created different effects of light and color by both changing how the camera focused, and also by moving the camera up and down and sideways as I was taking the picture.
I shoot with a Canon SX 10, but any camera with a reasonable zoom lens can create these same effects. So, be creative. Once you get your standard, basic shot, find new ways to see and create variations using that scene as your theme.