nothing happened when I pushed the button
Did you successfully upload the code to your board? Can you post a picture of your circuit? Perhaps a wire is in the wrong spot.
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It seems there is NO code going into my board. But here-
The only thing my board is doing is blinking... it can't get "Blink" out of it's mind... What do I do?
I can't even code it because of this.
Have you gone through the setup and first lesson and successfully programmed your board before? Do you have the correct port selected in your Tools menu? What does the software say when you try to program your board?
Well, I did the first and second lesson successfully, but after I put in the "blink" code in couldn't put on more lights AND have them all light up one after another... and then I couldn't code. I don't know why, but it says, "No plugin connection. Upload is disabled until you reconnect."
( what's a port? )
Revisit the Intro lesson to learn about selecting the right options in your software for programming your board: https://www.instructables.com/lesson/Tools-and-Mat...
It doesn't sound like you've successfully uploaded any new code to your board yet, so be sure to get that working before moving on to the more advanced lessons.
And make sure to plug your board in. If your USB port doesn't seem to be working, try another one or try restarting your computer.
I referred back to the 1st lesson but I couldn't find the button "port"
It's under the Tools menu. Here's the lesson (it's actually lesson 2): https://www.instructables.com/lesson/Tools-and-Mat... (the port is explained towards the bottom): "Then we need to select the communication port connected to the Arduino board. Select Tools -> Port, then whichever port name is labeled "(Arduino/Genuino Uno)." If none of your ports are labeled, try unplugging your board, checking the Ports menu, then replugging your board and checking the Ports menu again. Whichever port name disappears then reappears is likely to be your Arduino board. On Windows your port will likely be called "COM3" (or higher numbers) and on OS X it's likely to be something like "/dev/cu.usbmodem1461.""
look at my comment in lesson 1
it's lesson 2, and for anyone else reading, turns out Mike_Man is using the web editor.
Here's some tutorial info on the web editor, since this class uses the downloadable Arduino software exclusively: https://create.arduino.cc/projecthub/Arduino_Genui...
oops! said it twice!