Kitronik BBC Micro Bit move Mini Mk2 Manual page 16

STEP 3: Bring up MakeCode Blocks Editor (makecode.microbit.org).
STEP 4: Create the following code.
When button A is pressed, both servos should turn anti-clockwise
(looking from the wheel side).
When button B is pressed both servos should turn clockwise (looking
from the wheel side).
When buttons A + B are pressed the servos should stop turning.
If they do not then the centre point trimmer will need adjustment. On
the bottom of the servo, there is a small hole. This is used to access the
trimmer.
STEP 5:
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STEP 6: Test out the buttons.
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