Example #1

You will need two or more looks for your object:

Take this script to change to the next look in the list. Use wait bricks so that the look is not switched too quickly:

Note: When it gets to the end of the list, it goes back to the top.

Result

Example #2

You will need two or more backgrounds:

Take this script to change to the next background in the list if you tap on the right side of the stage.

Note: When it reaches the end of the list, it goes back to the top and starts all over again.

Result