Math Block and Random Number Block

Example 1 - Possibly used to detect a spinning or stuck wheel

   This code runs motors B and C until they stall.

   The code takes two rotation sensor readings, with a very short delay in between them.

   The loop exits when the difference between the two readings becomes less than a certain threshold.

   So if a motor slows down because it encounters an obstacle, the code will stop running the motors.

   A short delay in the beginning is necessary so that the motor can start moving before the rotation sensors start taking readings.

   Note that if the speed of the motor is decreased, the threshold for the difference needs to be lowered as well.

Example 2: Possibly used to simulate random movements or other actions in an area...avoiding another robot's gripper..."rope a dope"

   This code creates a wait for loop that will wait for a random amount of time.

   The code uses the random number generator and a loop that waits for the timer to equal the generated value.

   The random number is set between 500 and 5000, which causes the loop to wait for 500 and 5000 milliseconds.