/*   4x4x4 LED Cube   Connection Setup:    Columns   [(x,y)-Pin]   (1,1)-13   (1,2)-12   (1,3)-11   (1,4)-10   (2,1)-9   (2,2)-8   (2,3)-7   (2,4)-6   (3,1)-5   (3-2)-4   (3-3)-3   (3,4)-2   (4,1)-1   (4,2)-0   (4,3)-A5   (4,4)-A4   Layers   [layer-Pin]   a-A0   b-A1   c-A2   d-A3 */ //initializing and declaring led rows   int column[16]={13,12,11,10,9,8,7,6,5,4,3,2,1,0,A5,A4}; //initializing and declaring led layers   int layer[4]={A3,A2,A1,A0};   int time = 250;   void setup() {   //setting rows to ouput   for(int i = 0; i<16; i++)   {     pinMode(column[i], OUTPUT);   }   //setting layers to output   for(int i = 0; i<4; i++)   {     pinMode(layer[i], OUTPUT);   }   //seeding random for random pattern   randomSeed(analogRead(10)); } //xxxxxxxxxxxxxxxxxxxxFUNCTION LOOPxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx //xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx void loop() {   turnEverythingOff();//turn all off   flickerOn();   turnEverythingOn();//turn all on   de