I don’t have much time to create at the moment… so let’s recycle my old pictures. Maybe they’ll give ideas to some!
Anyway, here is a very simple « exercise » with fimo clay I love to do sometimes. One of the most simple techniques with a great result, most of the time. However, you need to have a polymer clay extruder (and if you don’t, you need to think about buying one ‘cause it’s one of the handiest tools you’ll find!)
Take old clay leftovers (make sure they are nice together even if you have just retrieved them from the very bottom of your fimo drawer where they were put way from 3 years) or new colours and use your clay extruder (see: here for how to make nice beads with a polymer clay extruder) with the square disc (well, the disc that makes square polymer strings, at least).
Then cut very thin slices of the coloured square string (take them from different places of the string so that they show different patterns) and stick them to a flat clay sheet.
Your "mosaic sheet" can then be used to make a nice simple pendant, a beautiful background for some creations... whatever you want. Just cut it with your blade or a cookie cutter and you're done.