Keyestudio 4WD Manual page 138

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"on start": command block only
runs once to start program.
Calibrate compass
The program under the block
"forever" runs cyclically.
Store the angle of the compass
heading into the variable x
When 293≤x<338，the next program
will be executed
appears on the dot matrix
When 23 ≤ x<68 ， the next
program will be executed
is displayed on dot matrix
When 68 ≤ x<113,
program will be executed
is shown on dot matrix
When 113 ≤ x<158 ，
program will be executed
pattern appears
the next
the next
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