Here is a cool take down and counter series you can train.
This is a foot sweep to a single leg take down.
Sometimes you can get the takedown directly off the foot sweep
This is a counter if your opponent chooses to stay outside the leg in order to adjust to the power position and finish with a high leg.
This is a drill you can do to get more comfortable with the flying scissors takedown.
This is a drill you can do to get more comfortable with foot sweeps.