Thanks for your answer.
I’m not really sure how it worked. But I added two additional TV.print(sensor);. One in setup and one in the loop. Seems to me like there was a conflict when the original program, that runs the sensor, also should print it to the TV. So one exact copy in it’s own { ………… } did the trick.
Otherwise it’s basically the basic text overlayprogram. Super easy once I got the hang of it.