Sorry, call me a noob please. That was actual quiet silly of me. 
I really thought about the structure and I could try something different. Since my indicators can only be turn on once at the time I also could power both left and right indicator with the warmup voltage, I then can program if both inputs are on then the warm-up is active, it would like look this:
I also dropped one row. I don't know if there is a way I could use it on RX or TX but that would be nice else I just to need to make a new animation 
Also to be honest I really have no clue how to calculate the resistors. So I used this calculator (with the 'Leds in parallel' formula) and it came out with 12 Ohm and 0.48 watt.
I used this as input:
- Supply Voltage: 5v
- Voltage Drop Across LED: 3.2v (LED's need 1.8v)
- Desired LED Current: 20 mA
- How many leds connected: 8
Also thank you very much for your time and patience Rob!