Blink Alternating LEDs
Step 1 - Build the Project
In this code, you’re placing digitalWrite commands side by side so they happen at almost the exact same time.
Step 2 - Upload the Code
Step 3 - Read the Walkthrough
Although the Maker Board actually runs the commands in order, the calculation happens so fast that the changes appear simultaneously.
The delay between the two ‘pairs’ of commands holds the program’s status for 100 milliseconds, or 1/10th of a second, then it quickly executes the next digitalWrite!