Sorry for the delay, I was in Clare for the wine festival and only had very flaky internet.
You started well but there has been a small slip in either my describing or your reading. Either way it is easy to finish from here.
What you are doing is asking the LEDs to share the resistors which they don't do very well, I did mention this earlier and that is why the greens are not lighting up. The reds are using different ohm resistors which is why one is brighter.
What you need to do is go back to having a pair of resistors for each LED. I have altered the diagram to show this.
Follow the power from the +12V through the NC of the microswitch to the COM then to both LEDs. The top one will be green and the power will flow out through the resistor junction which will be at about 7.2V (60%12) then through the 1.5K (R2) to 0 V. The bottom one will be red and power will flow out through the resistor junction which will be at about 4.8V (40%12) then through the 1K (R4) to 0 V.
When the microswitch is activated +12V flows through R1 and R3 to the LEDs via their resistor junctions (7.2 and 4.8) The top one will be red the bottom one green, the power from both will flow out through the COM of the microswitch and NO to 0 V
(And yes, all those about to chastise me, I do know that the current actually flows the other way from negative to positive but it will only confuse the situation for the learners if we start on that)
Tony
https://ozfreemo.com
https://adelaidemodelrailroaders.com
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