Quote from annalooba:

i have been taking lo ovral for a few years now. i am wondering what kind of effects i will have skipping the colored pills for the first time. will i have spotting the first couple times?

There is no way to know. It is possible to skip periods with Lo/Ovral, but that doesn't mean that you'll be able to do so without problems.

There isn't a set amount of "spotting time," either. Many women are just unable to skip periods, whereas others are. You'll just have to try it and see what happens.