Blink

Here is a very simple example that will blink the "L" LED attached to pin 13 of an Arduino. It requires no additional hardware other than an Arduino board.

The script starts with a "When Green Flag Clicked" block.

It is followed by Digital Pin Configuration block. This block sets pin 13 as an enabled Digital Output.

The "forever" loop block contains a Digital Write block that sets pin 13 to a 1.

This is followed by a "wait" block set to 1 second.

Next, is a Digital Write block that sets pin 13 to a 0, followed by a "wait" of 1 second.

When executed, the "L" LED on the Arduino will blink on and off at the rate of 1 second.