What things symbolize fire?

I'm designing a dream catcher tattoo in dedication for my Mom. I want to incorporate all five elements into it. So far I have shells for water, feathers for air, earthly colors for earth, the circle in the center for spirit, but I have nothing for fire. I thought about putting in fire colored beads in the web, but I thought that would look odd and ruin the design. I also have no place for a triangle. Any ideas for something I could use to symbolize fire?