Hello, if you want to do simple things only, then try gpioserver.
This is (current) scratch 1.4 with a build in hardware access. See https://www.raspberrypi.org/documentati ... e/scratch/
Similiar is available for scratch2.
For scratchClient I am somewhat biased, as I have developed this for scratch 1.4 and scratch 2. This tools is intended for school environments, supporting debug access for teachers and the possibility to have sample setup for experiments. And of course extensive documentation. Supports quite a lot of different chips, boards and services. You can send tweets with it, browse openweathermap. Or play with sonicpi by scratch. And of course also GPIO for a LED. Some people use this with an arduino board as general purpose interface board, with wedo2 and someone used build experiments with pi2go robot. It is very flexible but I have to admit that the setup is not a one click operation. See http://heppg.de/ikg/wordpress/?page_id=6
The scratchgpio8 is available since many years and a lot of books refer to this.
Hope this helps,