I need some help here.

I created a basic model having just an atom and set its coordinates as (0,0,0). Now I want to make it move along a certain path defined mathematically (say, along x axis) and I need to see it move. So I used a for loop. But I couldn't see and motion and soon realised that the loop is very quick in executing and thus I could see the atom at its last coordinates. So I tried to add delay of 0.5 seconds for each loop by importing time module and useing time.sleep. But still I couldn't see any motion and the coordinates of the atom is set only at the end of the for loop. I could not see the intermediate path. I am sure you people must have tried this earlier and this problem has a solution but I just couldn't figure it out. 

Can you please help me out?

Thank you in advance.
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