Weekly photo theme

I'm gonna have a little exercise on my blog. For myself. Just to keep my creative side of the brain going. 
Every week I'm gonna have a new theme. I have to post at least one picture a day within this theme.  
You decide what the theme is gonna be. Post a comment below with the theme you think it should be.
It can be anything from flowers, to colors, to nightmares, to feelings, to love. Anything. 
You have until sunday to post themes and I take the one that has the most "votes".