The goal of this project is to recreate the Invisible Ink effect of the iMessage app.

Here's how it looks so far:

• Improve and optimize the scratch percentage calculation
• Improve the ContentView usage to prevent adding it multiple times. Currently it's used 4 times:
  • The first time hidden by the canvas view
  • The second time to be revealed when the scratch percentage is greater than X percent
  • The third as a mask for particles
  • The last one behind the blurview
• Start deleting lines only if the user hasn't touched the view for X seconds