I am now on phone so its hard for me to write it corectly but in general
First. you have to create the overlay than change the anchor point
rotate 0 anchor point 0.5 0.5 in 0
for both tire overlays
AFTER you chang the anchor point replay it in preview and shift and scale them to final position.
(if you shift the overlay before you change the anchot point it will not be on place you want it)
this you make under the background.
I sugest to use @overlay create comand instead of writing it next to bavkground in this case
then the looping
if you want it rotate the comand will be
&overlay TIRE rotates 360 anchor point 0.5 0.5 in 1 THEN overly TIRE rotates 0 anchor point 0.5 0.5 in 0 loop infinite times
sorry if there are typos