 
 CRGB leds[NUM_LEDS];
 
-#define LOOP_TIME 50
+#define LOOP_TIME 20
 #define UPDATE_TIME 150
 
 #define _R 0

// The LED string snakes through the grid, so every row the positive x direction switches
uint8_t xy2i(uint8_t x, uint8_t y){
  if(y%2){
    // It's an uneven row: x should be reversed---or subtracted from the next row's first i
    return COLS*(y+1) - 1 - x;
  } else {
    // Even row: simply do COLS*y + x
    return COLS*y + x;

  for(uint8_t y=0; y<ROWS; ++y)
    for(uint8_t x=0; x<COLS; ++x){
      for(uint8_t i=0; i<3; ++i)
        colors[y][x][i] = (uint8_t) (((uint16_t) colors[y][x][i]*19 + new_colors[y][x][i])/20);
      
      leds[xy2i(x,y)] = CRGB(colors[y][x][0],colors[y][x][1],colors[y][x][2]);
    }
