Select one out of 2 specific files, copy and rename it

I need help running code locally using a terminal app called NewTerm2 on my iPhone (this app has limited functionality but it's more comfortable with unix commands) Here's the case: I have this tree /Library/Themes/"Variable Folder"/Bundles/com.apple.springboard/some images.png (Variable Folder can be any name) Variable Folders might contain several images but the ones I'm interested in are only Image1 or Image2, **to be clear, some could contain only one of these 2** I need to: 1- copy one of the 2 patterns only, "Image1.png" or "Image2.png" 2- rename the copied image "Variable Folder.png" and place it in another location. So I started with this code applying to Image1

/Library/Themes/"Variable Folder"/Bundles/com.apple.springboard

"Image1.png" /var/mobile/Documents/Dock-Temp/"Variable Folder.png"

But it worked only for the Variable folders containing Image1, so I modified it to this:

/Library/Themes/"Variable Folder"/Bundles/com.apple.springboard

. -type f \( -name "Image1.png" -or -name "Image2.png" \) | head -n 1 | sed 's|^./||' | xargs cp /var/mobile/Documents/Dock-Temp/"Variable Folder.png"

head -n 1 gets the first result from find, sed 's|^./||' removes ./ before file name But only the part of code up to xargs works, I'd be grateful if someone helps me find the error