Step #4 - Reverse the DC motors ....

Please note:
Here we simply reverse the motors for 1 second.

The next step starts by dragging the DC motor icon into the next cell (1,4).

Double Clicking the left mouse button over the DC Motor icon will pop up the window shown below. Again, here we can specify:

• which motor (1 and/or 2) will be turned ON,
• the velocity of the motor (range 1 to 5),
• the direction of the motor (cw=clockwise, ccw=counter clockwise), and finally
• the duration of time the selected motors are to run for.

next ....