Revealing an image behind a black screen

MIT App Inventor Help
1

The screen is by default black, but the user have to drag his finger over all the screen to reveal the hidden image.
The revelation of the card follows the tracing of the finger as it goes.

How can I code that ?

Thank you boyz :slight_smile:

2

or see

How to create a Scratchcard with App Inventor by Pura Vida Apps

3 Likes
3

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.