# Transition in animation

**URL:** https://discourse.paraview.org/t/transition-in-animation/3007
**Category:** ParaView Support
**Tags:** python, vtk
**Created:** [November 19, 2019, 6:14pm UTC](https://discourse.paraview.org/t/transition-in-animation/3007 "2019-11-19T18:14:47Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Samanvith\_A](https://discourse.paraview.org/user_avatar/discourse.paraview.org/samanvith_a/32/2378_2.png) [@Samanvith\_A](https://discourse.paraview.org/u/Samanvith_A)
#### Post date: [November 19, 2019, 6:14pm UTC](https://discourse.paraview.org/t/transition-in-animation/3007/1 "2019-11-19T18:14:47Z")

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Hello, Myself Samanvith.

I am doing my Post Grad from IIT Indore.

I have 6 VTK files of HI( neutral hydrogen) with redshift varying from 10-4. I want to show the transition of HI maps from 10 - 4.  
I am able to do it for two redshifts, but when I add more files, say I am able to make an animation of transition from 10 to 9, but I can’t make an animation of transition from 10 to 8 or more. So can I get some help with this?.

Thank you in advance

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### Author: ![Kenneth\_Moreland](https://discourse.paraview.org/user_avatar/discourse.paraview.org/kenneth_moreland/32/15033_2.png) [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)
#### Post date: [November 19, 2019, 9:03pm UTC](https://discourse.paraview.org/t/transition-in-animation/3007/2 "2019-11-19T21:03:54Z")

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@Samanvith_A,

I think you will have to be more specific on what you are doing for us to help.

If your 6 (7?) .vtk files are named using sequential digits (e.g. `HI_0.vtk`, `HI_1.vtk`, `HI_2.vtk`,…), then ParaView will automatically pick that up as a time series and allow you to animate them.

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### Author: ![Samanvith\_A](https://discourse.paraview.org/user_avatar/discourse.paraview.org/samanvith_a/32/2378_2.png) [@Samanvith\_A](https://discourse.paraview.org/u/Samanvith_A)
#### Post date: [November 19, 2019, 9:46pm UTC](https://discourse.paraview.org/t/transition-in-animation/3007/3 "2019-11-19T21:46:43Z")

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@Kenneth_Moreland  
I am showing how the hydrogen density changes with the redshift. So I have 7 HI maps file. So I want to show the transition from redshift 10 to 4.  
The file names are so- (HI\_10\_128\_grid.vtk, HI\_09\_128\_grid.vtk, … HI\_04\_128\_grid.vtk.  
But the ParaView is not automatically picking the files.