Remove background image from screen

Hi there, can anyone give me some help please? I need some blocks that will allow user to return the background of a screen to a plain colour after getting current background image from the screen and setting this to another area of the screen?
I have tried setting screen one image to a colour from the colours blocks but this doesn’t work?
thanks in advance for your help.

Set screen image to a blank text and then set the screencolor to the wanted color

That’s great thanks for your help!