I’ve been interested in Electronics for many years. In fact as an 11 year old boy my parents gave me thier old clock radio. Not really knowing what the hell I was doing I started poking around in it with a welding rod. (Yeah, connected to mains) The fear of god was put in me when the rod shorted something out. Lots of sparks and smoke. I put the radio back together and much to my surprise it had started working again. My parents used it for a few more years after that. A couple years ago someone gave me a box ful of electronic components. I started studying electronics about that time and at one point I was introduced to the venerable 555 timer. I build a simple led flasher on a breadboard and that was cool. Then I found a 556 chip. I learned that this was 2 555s in one chip. So I modified my simple led flasher to flash 2 leds. The circuit is designed to trigger the second led when the first one fires. So the two leds alternate and with a potentiometer it is variable. Then I come to learning KiCAD. I decided to create a PCB for my 556 circuit. Well it’s been a week of serious frustration. Fix one thing and something else breaks. For a few days I’ve had a schematic that passed all the ERCs. A couple days ago I managed to get total schematic parity. But it was only this morning when I finally got ALL the ERC to complete on the PCB with no errors, no warnings.