How do I make it change the y, but keep the x?

What do I do>

pls help it's for an assiment

Welcome Troy.

Your code example does not make much sense when it is used in a Screen1.Initialization Block and is incomplete (you have an empty then puzzle piece..

If the same code is in a Button you could set the x MoveTo to the sprite x value to "keep the X".

See Creating Animated Apps

Here are some resources to help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.

There is a free programming course here Course In A Box and the aia files for the projects in the book are here: App Inventor 2 Book: Create Your Own Android Apps

How to do a lot of basic things with App Inventor are described here: How do you...? .

Also look here App inventor español. Offline. Tutorial. Ejemplos. Instalación. Códigos. Juegos. Curso gratis de App inventor. and here Tutorial Index | Imagnity for more tutorials

Learn about components Component Reference
and visit the Library The MIT App Inventor Library: Documentation & Support Help>Library on the MENU

I'm still new to this, I don't kno wwhat i'm doing, just need to have screen1 intalize

I've done it with drag, but it doesn't work.

Set x to the imagesprite x