Basics of Sensors
Different types of sensors will wait for an event. Examples are touch sensors or a light sensor waiting until the light value is above a certain number. A touch sensor is either on or off, a light sensor can have a range of values.

The other sensors allow for different paths. The light sensor can be used in this manner as well as the sound sensors based on different degrees of exposure of the sensore (1 to 100 value such as how bright it is or how loud a sound is). The touch sensor can also give you two different paths.

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