Running dual functions at the same call time

[J-M-L]

you got the code tags wrong (you have to paste your code in between the three back ticks). I fixed that for you.

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regarding your question, the code does exactly what you say....

    servo_9.write(180); //servo goes in motion CW
    digitalWrite(6, HIGH); //Blue LED is on
    delay(2000); // Wait for 2000 millisecond(s)
    servo_9.write(0); //servo goes in motion CCW
...

things happen in sequence, with the delays in between

you need to get familiar with final finite state machine and using millis to handle time

For extra information and examples look at

• Using millis() for timing. A beginners guide
• Several things at the same time
• Flashing multiple LEDs at the same time