Variable named index

(Display Figure 14.)

The counter variable named index now appears between the square brackets in Figure 14.

The value of the counter variable named index:

• Will be used as the numeric index
• Causing the program to select the next penguin object in the array during each iteration through the body of the loop.

Once that penguin object is selected, the code in Figure 14 will:

• Cause its opacity property to be set to 100%
• Causing the penguin to become visible over a default time span of one second.