This recipe explains how you can set all the pixels to one color through a single call, instead of looping through all the NeoPixels and setting their colors individually. You can use this technique to create a nice effect to set all 10 NeoPixels to the same color. They are arranged in a perfect circle, so it creates a ring of color when they are all set to the same color. It is also an easy way to turn all the NeoPixels off in one call.
Setting all NeoPixels to the same color
Getting ready
You will need access to the REPL on the Circuit Playground Express to run the code presented in this recipe.