How to bounce the Terminal icon in the Dock by using a script command. The bounce is caused by the ASCII bell control code, number 7. By echoing the \a special character you send an alert to the terminal window.
When coding for Arduino you may wish to run certain code once every N milliseconds. For a very simple program like blinking a LED with a 2 seconds interval using the delay() function will be sufficient. But what about multiple bits of code where each require a different interval? Using delay() they will slow each other down, significantly disrupting your program. The solution is the meassure the last time the code parts were executed.
Quick reference to scaling SVG images using the tag attributes
Download 1 pixel transparent PNG image (1x1px, 68 bytes)