Tag The Tile (don't tap black)

In the not too distant future. Authorities have vowed to put an end to all graffiti and tagging. In an effort to bring this vision to fruition. They have decided to attempt to move all white surfaces so that they are not in one place long enough for graffiti artist to tag. They have also surrounded these coveted white surfaces with black decoy walls that instantly relay your position to the police! Tag the white tiles don't tap the black tiles!