Editing Light sensor (section)

== Counting ==

The second example "Counter" uses the light sensor as a counter to detect whenever a light beam is broken.
As supplied, the sensor will detect light falling on it from a wide angle.
For this type of use the sensor will perform more accurately if the sensor is mounted at the end of a tube with a light source, for example a torch, pointing at it from some distance away.

=== Procedure: Counter ===

 number = 0
 PRINT "Press the space bar to stop counting"
 REPEAT
 WAIT UNTIL LIGHT IS LESS THAN 50
 LET number=number+1
 WAIT UNTIL LIGHT IS GREATER THAN 75
 UNTIL INKEY=32
 PRINT number