One of the best thing you can do when learning to create sketches is to create a custom LED board. Using this you can create many simple examples to help you learn.
In our example its a case of 8 LEDs and their corresponding resistors, these can be connected to the pins of the Arduino.
Here is a layout using Fritzing (a great tool for visual mockups)
Now here is our sample which I roughly made on eurocard.
Here is a partslist
|8||Red LED – 5mm||package 5 mm [THT]; leg yes; color Red (633nm)|
|1||Arduino Uno (Rev3)||type Arduino UNO (Rev3)|
|8||220 Ω Resistor||package THT; tolerance ±5%; bands 4; resistance 220Ω; pin spacing 400 mil|