Hi @trebeck
welcome to the arduino-forum.
Well done posting code as a code-section in your very first posting.
You are asking for a medium advanced functionality that requires medium advanced knoweldge about programming.
It will need a medium time to learn these medium advanced programming.
You have two a sequences that should proceed from step to step each in their own speed.
This means both sequences must advance from step to step in parallel.
As user @UKHeliBob mentioned parallel code-execution requires non-blocking timing as a must.
There is no other way to do it.
As your LEDs shall not only blink but they shall be switched on/off in a more complex pattern
this can be done using a coding technique called state-machine.
Both are medium advanced programming-techniques and this is what you have to learn to be able to apply it to your code.
So here is a tutorial that explains the basic principle of non-blocking timing
and here is a tutorial that explains the basic principle of state-machines
As already said: it will take some time to learn this. It is not done in 10 minutes.
best regards Stefan