Changes

<gallery heights="250" mode="packed">

<gallery heights="250" mode="packed">

File:1.Phet - click on the link.png|

File:1.Phet - click on the link.png|Click on the link provided below

File:2.phet - click on any simulation.png|

File:2.phet - click on any simulation.png|Select any simulation you want to download

File:3.phet - click on the download option.png|

File:3.phet - click on the download option.png|Click on the download icon to download the selected simulation.

File:4.phet - allowpermission.png|

File:4.phet - allowpermission.png|After downloading the simulation, go to Properties and check mark the "Executable" option to run the downloaded simulation offline

</gallery>

</gallery>