I can"t find mistakes

Hey guys I am a college student , my classmates and I want to make a game like a puzzl. We put our picture on program but the size is very weird.Thus,I want to know how to fix this kind of problome.Thanks

Btw this is my program

What should it look like?

And please read this first:

This picture is which I upload

The picture need to cut for nine pieces just like puzzl..

Use @Taifun 's image extensionUse ceate chunks block

image taken from Pura Vida Apps