Congratulations!
It looks like you are missing the 0.1 uF decoupling capacitors on the power lines. You might get by without them but really you should use them
well it was just to test the circuit. so i didn't thought it would be nessesary since it's only temporary
Good work. And you are sure it is blinking at 1.0 second intervals and not 0.8 (16/20) second intervals.
after testing again, it is actually a bit slower than a second. i held it up next to my windows clock and after a few seconds it falls behind the clock.
though i did everything like said.
EDIT: anyone? i have no idea what i did wrong...