One Color Space

Brand new logic puzzle. This isn't any imitation or modification of existing games.
This game has very simple rules.

Just color all the blocks in one color.

Principle :
Every time when you choose a block, the color changes.
Rules :
First step: choose one block
Others steps : Now, you can only choose max. four adjacent block for next move
End game : when are all blocks colored in same color

Looks simple. Prove it!!!