Jugs

You have a 4 liter jug and a 9 liter jug and you have got a pool with water.

What is the minimal number of steps you have to take to come up with exactly 6 liters of water?

Well, you cannot pour some water into the 9 liter jug and then guess whether there is 6 liters or not. And you cannot fill just half of any jar with water. One step means - one movement - putting water into one or another jug. Emptying the jug is not a step. For instance, filling the 4 liter jug and then pouring it into the 9 liter jug is 2 steps.