You can try with this.Nev
Just re-tried it: by me it is working.What do you get?
Have you put the block inside a "do every 'x' seconds" block (where x=0.1) ? Be sure you put the so formed block in "When Created" and not in "Always".
Can you post a screenshot?
OK, if you look carefully, the formula is not the same as the one I posted. The "round" block has to wrap ((seconds-1)x10) only, NOT the entire (((seconds-1)x10)/10) And... Wasn't your intention to decrement by 0.1? Using that formula with integer numbers is useless.
Well in the second attempt you fixed the math block but you removed the "do after 1 sec" before the "do every 1 sec" block, try putting that back.