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From where I will get counter and timer for the logic ciruit?

There are some counters for example you can download a sample digital clock. There is a 4 bit counter there. Another way is just to build it yourself out of T flip flops. This is very simple actually.
What do you mean by timer? Will the sample mentioned above help?

Dear Sir,

u see there is one counter block in all software like, if there is some input signal there is one incriment automatically.I want to compare this counter to a particular constant so if the counter set value is reached output value of counter is high.
Same for timer also? In PLC softwares I have seen there are built in counter and timer block. But in this software there is no built in block.

Thanks

In the digital clock sample there is count circuit it has clock input and operation input and 4 bit output. If the operation is set to 1 it counts every clock input in 4 bits. If the operation is 0 then on the next clock the counter will reset to 0. This count is used 4 bit Modulo N counter which takes constant and counts till its value then resets if count value reaches or exceeded constant.
Hope it helps.