Making zikr

Can I read this tasbih all time after fardh namaz:

1. Istighfaar 100 times

2. La ila ha illalah 100 times

3. La ilaha ila anta subhanaka ini kuntu minaz zalim 100 times

4. Subhanalah wa bi hamdi 100 times

5. Hasbi rabi Allah 100 times

Even in my qiyamul layl I read all these tasbeeh and I have a habit to finish my tasbih in my qiyamul layl 100 times first kalima, 100 times 3rd kalima and 100 times istighfar, is it ok?