Sandbox
This is a "warning1"... The warning sign is scaled to the size of the text indent and centred in the left margin. Hope it looks OK.
This is a "warning1" again ...
But it's way too big.
Blah blah blah.
Rhubarb rhubarb rhubarb.
Whoops it overflowed.
"warning1" again...
But smaller.
This is a "warning2"...
The text overlays the image.
Again, size is important...
This is a "warning3"... where the image is scaled to the text size, but it doesn't look so good.