The 1st Raspberry PI GPIO project most people start with is to set an LED on or off. This gem simply allows you to set the state of multiple LEDs (either on, off, or blink).
rpi=RPinew%w()# <-- each pin connects to an LEDrpiled1onsleep2rpiled1offrpiled2blinksleep4rpiled2stop
Note: The blink value can be changed from the default 0.5 seconds to blink more often (e.g. 0.2) or less often (e.g. 1.5).