Picture of Arduino LED 4x4x4
This is some step how i made a arduino 4x4x4 whit 64 leds 

Step 1: First

Picture of First
Ill check all the led and looking for some defect leds.  after i have tested all the leds i make a diagram for how i gonna connect these leds

and so I make a level where I made the right distance between the LED

distance is 1,5cm fron eatch leds