Thank you xcal, this is exactly what i was thinking of ! Amazing! 3 years ago^^
And I'm used the lastest xlabel module, I should have mentionned it, my bad.

I didn't knew your FBL Dynamic theme, and it's really a masterpiece ! Totally customizable, presets savers, "xprop picker" , how could i missed this theme ?
Everything I need to do my own try is inside, gonna play with it for a long time :)
Thanks again !