1 Set the KEYES-2812-18R module to turn on 18 RGB LEDs in various colors. When micro:bit robot moves
forward, 18 RGB LEDs turn on blue light; robot moves backward, 18 RGB LEDs turn on purple light; robot stops,
18 RGB LEDs turn on red light.
2 Measure the distance between the robot and obstacles using an ultrasonic sensor.
3 When the measured distance is greater than or equal to 10cm, the micro:bit robot moves forward; if
less than or equal to 6cm, robot will move backward; if greater than 6cm but less than 10cm, or greater than
30cm, robot will stop.
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