Instructions:

Open the StarLogo file attached below.

Open and read the program's Info Window (Menu - Windows - Info Window). Learn about how the brown ground line is drawn across the bottom of the graphics canvas.

To see how the brown ground line is drawn, do the following:

1) click the "Clear Graphics" button

2) use the Speed slider at the top of the graphics window to slow the program down (try setting it to 20)

3) click the "Draw Ground" button to see the ground drawn in slow motion.

Quit the StarLogo program when you've finished experimenting. No need to save the program.