[ns] change the queue reference in AQM tcl program

[ali majeed]

hi to all i need help to solve this problem 
 
i need to change the queue reference  to be multi step function(multi level 300 200 500 200)  like  the attach picture instead of  (200)
note:
the below  instruction used to set queue reference   in tcl program in AQM in queue
"$ que set quref_ 200 "
how to modify it to be (multi level 300 200 500 200)
thank you very much 
ENG. ali m