For BORK and Bill SCHONFELDER
You probably don't need to watch the demo. The Blockly code is attached (changed slightly since the video - I stupidly had no condition for 30-40cm, so nothing happened in that range).
No need for a Fritzing - it is just the DFMini + OLED setup with the US sensor.

https://www.youtube.com/watch?v=nvshVcgtsYk