Yesterday I tried MILD for the 2nd time, and I had a good LD!

But there's something in La Berge's instructions that I dont understand.
He says:
-set intention
-make the visualization

Repeat these steps until you fall asleep.

Ok, then.... you repeat your mantra and later you make your visualization, but for how long? when I sart to repeat my mantras? when I can't imagine more for the visualization? Could it work without visualization phase?

I think that yesterday I repeted my mantra for several minutes, later I made a little bit of visualization and repetead my mantras ans so on. But I dont know at what phase I fell asleep.

Thank you

NOTE: sorry for my english