Here is a link to the Card Template: https://www.instructables.com/files/orig/FN8/WSG9/GYDLX3EW/FN8WSG9GYDLX3EW.pdf
The tutorial is done in real time so that you know exactly how to make it.
For those of you scratching your heads, it's a combination of the guy in the cave who says this message and the heart container that gives you precious extra life.
The idea for this card comes from kate12345's Pixelated popup card Instructable.
Kevin MacLeod (incompetech.com)
Licensed under Creative Commons "Attribution 3.0"
Model: Zelda Pop Up Valentine's Day Heart Card!
Instructions found on: https://www.instructables.com/id/Zelda-Pop-Up-Valentine-Heart-Card/