To create a spinner, add an image to the screen and select the spinning gif file. If you don't have a spinning gif file you can search for one on the internet and download a version that you like.
Create a variable (varShowSpinner) to turn the spinner on or off and set the visibility of the image to this variable.
For demonstration purposes I am going to create two buttons to turn the spinner on and off.
The Start Spinner button I set the varShowSpinner variable to true.
The Stop Spinner button I set the varShowSpinner variable to false.
Now lets demo the spinner.