Demonstration of all ways to color a red-black tree.
gifs are generated using AT&T's dot directed graph formatter.
Input string for tree is:

***..*..**..*..

tree number 0 RBR..R..BR..R..



tree number 1 RBB..B..BB..B..



tree number 2 BBR..R..BR..R..



tree number 3 BBR..R..RB..B..



tree number 4 BRB..B..BR..R..



tree number 5 BRB..B..RB..B..



tree number 6 BBB..B..BB..B..