Keyestudio 4WD Manual page 91

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(1)Project Description
Dot matrices are very commonplace in daily life. They have found wide
applications in LED advertisement screens, elevator floor display, bus stop
announcement and so on.
The LED dot matrix of Micro: Bit main board V2 contains 25 LEDs in a grid.
Previously, we have succeeded in controlling a certain LED to light by
integrating its position value into the test code. Supported by the same
theory, we can turn on many LEDs at the same time to showcase patterns,
digits and characters.
What's more, we can also click" show icon " to choose the pattern we like
to display. Last but not the least, we can design patterns by ourselves.
(2)Experimental Preparation：
 Connect micro:bit to computer with the USB cable
 Open online Makecode editor
Import Hex profile (How to import?)
Or click"New Project"and drag blocks step by step
(3)Test Code
Code 1：
91