Description based style with a counter

[Claus Hentschel]

Based on the koma article layout I need an own style like the default
'Description' (M-a d) style (only the first word is bold and the paragraph
indented). The first word should be a text label (Example 1:) followed by a
counter and a colon.

Does anybody have a layout with such a style? I have tried to write an own
layout file but due to poor latex know-how I always get environment errors
when running latex!

Thanks in advance
Claus