Step 1: On the Graphics tab of the Ribbon in the Shapes group, select Rectangle.

Step 2: Click and drag on the ANIMATION screen to shape the object.

Step 3: Double-click on the Rectangle to open the Object Properties window.

Step 4: In the Caption, type VISIBILITY.

Step 5: With the object selected, on the Graphics tab of the Ribbon under the Animations group, select Visibility/Position.

Step 6: Double-click on the rectangle to open the Visibility/Position animation properties window.

Step 7: Under Visibility, use the System Tag BlinkSlow as shown below.