I'm not going to wire up 6 leds to test it but that code looks like it should run through the faster and faster blink part once and then do the fast blinks over and over.
The first time through the slow to fast blinks, delayValue is reduced until the loop exits.
And delayValue is never made > 20 again so while(delayValue >=20) is never TRUE again, you get the picture?
Your fingers would benefit wildly by learning the Array example in your IDE. You can load it through the File menu.
File->Examples->05.Controls->Arrays