pwm with varying frequency and clock

Hi,

I am trying to write Verilog code to generate

1.a set of lower frequency clocks with certain step size from a 50mhz

2.then duty cycle varied each of these frequency

In program 3 counters used.

counter> to generate lower frequency clocks

counter1> to vary duty cyle

counter2>to select frequency value

in compilation itself there is error in code.please help me ....

Thankyou