Sound effects

Some sound effects are available; they can be turned on and off at any point in a program using sound(True) or sound(False). At present, I consider this to be more of a proof-of-concept feature, although I am told that it is popular with some young children.

I have found that sound effects are not always played reliably when too little time is available for each action; thus, except for the sound effect at the very end of the program's execution, sound effects are turned off if the delay between each frame being displayed, set using the think(delay) function, is less than 250 ms, even if the user included a sound(True) command.

At some point in the future, I will likely revisit the way I've implemented sound effects in an attempt to make them more interesting ... and find a way to include sound effects for beepers: I will likely have sound from beepers being turned on only when Reeborg would be at a grid location where beepers are present, as it is described in the original Karel the robot.