How to use analogWrite() on multiple pins at the same time? I would like to do,

analogWrite(100,3);
 analogWrite(200,6);

at the same time. But the problem is that only the led on pin 3 lights up. I want both to light up at the same time. I've heard about direct port manipulation, but I can only find an alternate for digitalWrite() but I couldn't find one for analogWrite(). Can someone please help me with just a simple example on just how to do the above operation? 

I'm using arduino uno.
You have your parameters the wrong way round:

analogWrite(2, 100);
analogWrite(6, 200);


However: pin 2 on the Uno cannot do PWM, so you will have to pick a different pin. Look for the pins marked with ~ - they are the PWM pins. On the Uno that is pins 3, 5, 6, 9, 10 and 11.