This forum limits new users from posting images until they reach Trust Level 1. This often trips up new users, since they can't really ask a smart question unless they can share things like schematics or legible pictures of their project.
My suggestions for what they need to do is this:
My top picks for the best first five topics to read are:
- How to get the best out of this forum by @PerryBebbington -- to learn how to post productive questions.
- How to Wire and Program a Button -- A discussion of the official Arduino "How to Wire and Program a Button" tutorial that goes with the Arduino IDE's built-in File/Examples/02Digital/Button.ino example. This thread shows some concerns about the tutorial and advice about how to wire up a button safer and easier.
- Planning and Implementing an Arduino Program by @Robin2-- A great way to plan your program to be flexible, easy to read, understand, maintain, and extend. ( Live Sim: Lesson A ... Lesson G )
- Demonstration code for several things at the same time by @Robin2-- An example running a couple blinking LEDS, a button and two servos, all independently. (Live Simulation)
- Flashing multiple LEDs at the same time (thread by @PerryBebbington & others) -- several different styles of blinking leds. These are a collection of some natural extensions to the Blink.ino and BlinkWithoutDelay.ino . There's more than one way to do it. (And if you can blink LEDs, you can run a motor, trigger a device, or do many other tasks) Also, these multiple ways of doing the same thing task might help folks understand the important concepts behind the often-recommended BWOD example.
- (Off-site: @nickgammon on blink)
Edit: Shared From Below:
- Serial Input Basics - updated by @Robin2 -- How to read serial input without blocking other code from running. (HT @DeltaG)
- Other Serial processing:
- pcRead by @gcjr -- one-character parsing diagnostic/control tool (w/ Simulation).
- Two ways communication between Python3 and Arduino
- (off-site: @nickgammon on serial)
- Wokwi simulations of Serial processing
- How to make a schematic you can post by @johnerrington -- Suggestions about how to explain the connections to your Arduino with a legible diagram.
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If you've got a better list of the top 5 topics for a noob to earn trust by reading, please share.