color studies - daily color squares

Before I start work, I like to do these little color explorations as a warm-up exercise. I have very strict rules about them: 

1. I must not worry, or even think, about the end result. This exercise is purely about the joy of playing with colors.

2. Only colors, textures, and abstract shapes are allowed. Whatever the end result is, it must not look like a thing. 

3. They must be done very quickly, without thinking or planning. No more than five minutes.

4. If I do several in a row, I must use the last color I used to begin the next painting (this makes it more challenging because it forces me to find new combinations).