Screen Test - detect screen

This is a screen test application.
In full-screen mode, it can assist you to detect whether there are dead pixels on the mobile phone screen, whether there are problems with touch screen touch, and can detect the number of multi-finger touches.
Dead pixel detection: By switching different colors, observe whether there are dead pixels on the screen.
Touch detection: Carry out line filling on the screen, and observe whether the screen can be filled completely.
Multi-touch: Use as many fingers as possible to touch the screen one by one at the same time to check the number displayed.