One finger hold and second finger swipe

Hi all! Just starting to break into BetterTouchTool but struggling with getting the following desired functions via the trackpad. Essentially, I would like to be able to COMMAND + TAB and COMMAND THEN TAB for easy window switching, but I am having difficulty figuring out how to do this.

To expand:
Function 1: toggling between last apps (COMMAND + TAB)
Concept: Hold down one finger and swipe with another (up or down) to switch between the last two windows. ( basically COMMAND + TAB) on each swipe (any direction)
How: holding down the middle finger and swiping with the pointer finger

FUNCTION 2. Swiping between all open windows applications (COMMAND THEN TAB)
Concept: Clicking down on one finger (which = COMMAND) and swiping with another (LEFT OR RIGH) and it's cycles THROUGH each open window based on the direction of the swipe
How: holding down the middle finger and swiping left and right with the pointer finger.

Thanks!