abstract abstraction blue eye eyelid graphic green grunge light light streaks paint painting astronomical object atmosphere black darkness flare nature night outer space sky star universe bird BIRD FLOCK birds tree tree branch tree root background color colors light and rays rays red white yellow bubble colours orange texture colour decoration decorative light blue stars ancient clouds drawing house old plants sketch trees windows grass leaf moss Non-vascular land plant plant Soil vegetation art brown electric blue glass pattern purple rectangle symmetry Tints and shades violet computer wallpaper heart human body love macro photography organ petal valentine's day circle design flora flower