You can control the robot's movements by dragging and dropping various "code blocks," or "commands," from the middle "Block" section to the "Workspace." These commands are simply instructions that tell the robot what to do. Once the commands are in place, clicking the Run button will cause the computer to run or "execute" the commands in sequence, one after the other.

We will get the hang of it by starting with just a single command that has already been placed in the Workspace for you--the driveDistance command:

To tell the robot how far to move, you enter a number into the blue box in the driveDistance command, then click Run. This number is called the "argument" for the command. To move the robot again, click "Reset", enter a different value for the argument, and then click Run again.