what do they symbols next to forum topics mean?

[0tt3r]

hi, i've been on CS a while, but i've never understood what the different symbols next to forum topics mean; i'm reffering to these:
also what is the difference between the moving ones and the still ones? they must have a meaning, i'm just not sure what it is! could anyone help me?

[Keir;]

grey means you've seen the most recent post
red means that you've haven't seen the most recent post

* means that you've posted on the thread
no * means that you haven't posted

scrolling means that it's a more active/high-traffic thread
not scrolling means that it's less active

the lightbulb shape means it's a stickied thread, which is used for information/rules/etc. that need to stay at the top of the board it's in
circle is for all other threads

[0tt3r]

grey means you've seen the most recent post
red means that you've haven't seen the most recent post

* means that you've posted on the thread
no * means that you haven't posted

scrolling means that it's a more active/high-traffic thread
not scrolling means that it's less active

the lightbulb shape means it's a stickied thread, which is used for information/rules/etc. that need to stay at the top of the board it's in
circle is for all other threads

thank you so much for explaining!!!