Well another piece of the puzzle figured out
I actually got a 4 aspect signal head to work the way I wanted! Amazing
It shows red if the points are wrong or if the next block is occupied. It goes flashing yellow if the second block is occupied and yellow if the 3rd block out is occupied. Green if the points are right and the next 3 blocks are clear.
Of course this is still in simulation on my main PC. As the switch is run or the train passes through the blocks, the signals automatically change according to those rules.
Once I get most of it setup, I will install it on the layout PC. There is alot more to learn and set up yet. This will be so cool if it works on the layout.