down in the bottom of one of your units in the Initialization Section create that image as a stand alone
image.
And in the finalization section free it.
have the Variable for it in the interface.
if this image is going to be shared among multiple units then I would suggest you place this image in those sections in a unit marked as common, meaning this unit will be referenced from all other units in your program.
This same unit can also hold common data and functions used in all of your other units, too.