This program says "Hello." 

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The code will run Motor A in a random direction (via a Random-Comparison Block combination), at a random speed, for a random amount of time. The motor speeds will fall between 0-100 and the time will fall between 0-3 seconds.

This program is works like the Line Follower: Wait for Dark program but it uses a Switch. The program runs a Switch--in a infinite Loop--that runs Motor A and makes sounds when reading light. The program stops Motor A then runs Motor C for 0.25 seconds when reading dark.

This program runs Motor A until the light reading is less than 50. Once the light reading is less than 50, Motor A stops and Motor C runs for 0.25 seconds. This processed is infinitely looped. 

This code uses two very important coding commands, Switches and Loops. The touch sensor Switch causes Motor A to go forward if the touch sensor is released and backward if it is pressed. The Loop causes the Switch to loop infinitely.

This code illustrates the Wait-for-Push command. When a touch sensor on Port 1 is pressed, Motor A will stop.

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There are many ways to stop a car at a black line. Using a light sensor attached to Port 1, the program takes the initial light reading, drives forward (one motor car) and waits for a difference greater than or equal to 5. Once this difference is reached, the Switch stops the NXT and exits the program.

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When run, this code will cause a car to "snake" forward in wide arcs. The length of the turns can be modified by changing either the time or motor power.

This program beeps, runs Lurch-1, then beeps again. 

This code uses a Loop to turn Motor A on-and-off three times. When downloaded to a single motor car, this program will accelerate the vehicle forward in three short bursts. The number of loops can be changed by modifying the Count of "3". Alternatively, if you want an infinite program, you can set the Control of the Loop to Forever.