How do I write a code which will detect the input pulses as a bit?

I have pulse train as 1010111111111100. Sample rate of the pulse as same as sampling time of the simulink model. I want to know that how can I write a code which will read first 4 bit(10 10) then will give output as like as input(0000111111111100) without first 4 bit and then will stop after getting the the bit 00.

[Walter Roberson]

Why not just drop the first four bits instead of reading them?