This is a cpumeter theme that i modified to use svg files instead of png to enhance the clarity at larger sizes. I have also tried to centre the indicator arrows of which on original themes seems to be slightly off-centred.
1.Untar the archive
2. Navigate from nautilus to: /.screenlets/CPU_Meter/themes
3. paste the unziped folder here
4. Run the cpumeter screenlet and navigate through themes.