This instructable draws on the work of the guys at “Citilab” http://seaside.citilab.eu/scratch .
They have created a modified version of Scratch to interface with Arduino.
Using Scratch Programs you can make Arduino Flash Lights, Read Buttons, and do many of the things that you can do with the the regular Arduino environment.
So if you like Scratch and Arduino but are not quite ready for C programming (yet), this is something you can try out.
Step 1: You Will Need
1. S4A ( Scratch 4 Arduino) and
2. the Firmware for Arduino to talk to S4A
For our experiment you will need:
* Arduino UNO
* Some LEDs
* A 560 Ohm resistor for each LED (or a value similar to that)
* A 10k Ohm resistor
* A Pushbutton Switch
* Breadboard for wiring up e.g. (http://goo.gl/1E1iIl)
* Some Wires