New development: I have found that both the marquees, text and image, can be run with just one code, enabling me to remove the longer code for the image marquee.
The Con is that the two marquees cannot be controlled by code individually, and both marquees will be centered together (on their two tracks) moving with the same speed.
However,
the fun is that they can be de-synchronized with the cursor. We can stop one and let the other move and vice-versa.

I won't load that code on tiiny.site for the moment, but I have saved that on my computer. Members may find it amusing.
Another development: I have been able to make the symbols image responsive, i.e., it will get proportionately smaller when accessed on mobile. That is a big
+.
IMHO, the design part is over with this, unless you make a request.