int scalefactor;

int[][] rArray = new int[8][8];
int[][] gArray = new int[8][8];
int[][] bArray = new int[8][8];
int[] rPoint = new int[2];
int[] gPoint = new int[2];
int[] bPoint = new int[2];



void setup() 
{
  rPoint[0] = round(random(0,7));
  rPoint[1] = round(random(0,7));
  gPoint[0] = round(random(0,7));
  gPoint[1] = round(random(0,7));
  bPoint[0] = round(random(0,7));
  bPoint[1] = round(random(0,7));
  scalefactor = 256/16;
  size(400, 400);
  framerate(15);
  background(0);  
}

int[] transthing(int[] input)
{
  int rando = (int) round(random(0,3));
  if (rando == 0) input[0]++;
  else if (rando == 1) input[0]--;
  else if (rando == 2) input[1]++;
  else if (rando == 3) input[1]--;
  
  if (input[0] < 0) input[0] = 7;
  else if (input[0] > 7) input[0] = 0;
  
  if (input[1] < 0) input[1] = 7;
  else if (input[1] > 7) input[1] = 0;
  
  
  return input;
}


void draw()
{
  
  rPoint = transthing(rPoint);
  gPoint = transthing(gPoint);
  bPoint = transthing(bPoint);
  
  rArray[rPoint[0]][rPoint[1]] = 16;
  gArray[gPoint[0]][gPoint[1]] = 16;
  bArray[bPoint[0]][bPoint[1]] = 16; 
  
  for(int i = 0; i < 8 ; i++)
  {
    for(int j = 0; j < 8 ;  j++)
    {
        rArray[i][j]--;
        gArray[i][j]--;
        bArray[i][j]--;
        if (rArray[i][j] < 0) rArray[i][j] = 0;
        if (gArray[i][j] < 0) gArray[i][j] = 0;
        if (bArray[i][j] < 0) bArray[i][j] = 0;
    }
  }

  rArray[rPoint[0]][rPoint[1]] = 16;
  gArray[gPoint[0]][gPoint[1]] = 16;
  bArray[bPoint[0]][bPoint[1]] = 16; 
  
    for(int i = 0; i < 8 ; i++)
  {
    for(int j = 0; j < 8 ;  j++)
    {
    //fill((random(0,16)*scalefactor)-1,(random(0,16)*scalefactor)-1,(random(0,16)*scalefactor)-1);
    fill(colorDo(rArray[i][j]),colorDo(gArray[i][j]),colorDo(bArray[i][j]));
    noStroke();
    rect(i*width/8, j*height/8, width/8, height/8);
    }
  }
  
}

int colorDo(int col)
{
    col = col * 16;
    
    return col;
}