Animation Using Tcplot Urgent!!!!!!!!!!!

Hi everyone:

Basically, I have a question regarding the animation using Tcplot:

I have a code in fortran “F90” and I want to write the velocity field at every time step, could any one tell me in how we can do this?. I know we should write the data of the u and v velocity in a certain format in txt file to get the animation by using Tc plot, can any one tell me how?

Please let me know brothers…