Keep it OPEN adjustable door stop

I made this wee doorstopper to keep my garden door slightly open for ventilation.I have plants on the window that would freeze if I forgot to close it and I hate keeping the actual door fully open as the wind always makes me think it will rip out of hinges so this little print should allow for the door to stay slightly open and won't close.It could be used indoors well to keep doors open for pets etc. or to keep windows open if you don't have a wee stopper built into them.And finally, I will mou