Sandbox

This is a "warning1"...

You need to have a fair amount of text,

or you won't be able to see the warning sign...

because it is scaled to the size of the thing it covers.

This is a "warning2"...

It's a bit smaller to see what happens.

Sooner or later it gets too small for the warning sign to be visible.

This is a "warning3"...

This one is definitely too small.