Open a GUI upon another one

So im making a GUI plugin.. this is very hard to explain so let me give you an example

So I open a GUI and there is 4 slots the first one has a piece of redstone, the next slot has a ender pearl, and the next one has a diamond and the last one has a emerald

Now my question is how do I make it so if I click the redstone it will open a different GUI and close the current one?

 

We need to see a bit of your code first.

 

XgXXSnipz
Listen for when the player clicks on the red stone -> Open the other inventory

 

XgXXSnipz InventoryClickEvent if item is diamond in your special GUI, open a different inventory.

 

You have to open the other inventory (in a scheduled task) to happen a tick after the InventoryClickEvent is called.

See the JavaDocs: