how to make sine replica carrier for GPS code tracking loop

Hi.. I'm trying to make GPS tracking code loop with MATLAB. Long story short, to make a DLL I need to make SIN replica carrier and COS replica carrier which will be multiplied with code generator to make I and Q components. However, I have no idea how to make them.. I thought I would have to simply multiply repteadly [0 1 0 -1] for SIN replica carrier and [1 0 -1 0] for COS replica carrier.. Maybe I'm having a wrong idea what COS or SIN replica carriers are.. Please help me out... If I succeed on this, I will also post my code here so I can help other people looking for a DLL carrier code..