ArmorStand "move" when the marker tag changes

ArmorStands move in the north-west direction if you change the Marker tag between true and false.

1.summon an ArmorStand
2./entitydata @e

{Marker:1b}

3./entitydata @e

{Marker:0b}

4. now you should see the ArmorStand moving diagonal in the north-west direction

(5. if you repeat this 3times the ArmorStand will fall through the ground)