One morning after one of our first frosts, I went looking for interesting things to photograph. In the alley behind our house I found a 1950s era Chevy parked near our neighbor's back garage. What drew me to this subject was the soft, rust color or the car's body (which is barely visible in this picture) and the cool, blue-tinted frost on the front window.
This shot is almost an abstraction in that the eye may not know exactly what is pictured here. Frost is also "almost abstract." It seems random in many ways; though if you look carefully, there are patterns. What is the cause of the patterns? You'll have to answer that question yourself.
5D 1/200s f/4.5 ISO400 105mm (Canon 24-105 f/4.0L)