Thank you, it works! 
I had it in drum mode because the brightness of the LED was very low.
I didn’t have the controller in drum mode at first, but as soon as I controlled the LED via Bome, it wasn’t very bright. I had found a video on Youtube where someone had explained that the LEDs are brighter in drum mode.
But with your file the LED is as bright as in drum mode.
That means I can now actually copy the translator ‘Feedback’ you prepared for all the buttons I want to flash? and for the others that I don’t want to flash I use the setting from tutorial Emulate LED feedback on a MIDI Controller?
and one more question: with the variable oo can I set how fast it flashes?