Keyestudio Smart Little Turtle Robot V3 Manual page 212

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myMatrix.drawPixel( j, i,1);
LEDArray[i] = LEDArray[i]>>1;
}
}
myMatrix.writeDisplay();
}
//*******************************************************
(5) Test Result
Upload program to development board, insert Bluetooth module, open
App to connect Bluetooth. Next, press icons on App to control turtle robot
car to move.
Special Note: you need to remove the Bluetooth module before uploading
the test code, otherwise the test code will fail to upload.
Reconnect the Bluetooth module, after uploading code successful.
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