#import<FastLED.h>
#define NUM_COLS 20
#define NUM_ROWS 20
#define NUM_LEDS 256
CRGB leds [256];
void setup()
{LEDS.addLeds<WS2812,3,GRB>(leds,256);}
void loop() {
byte x = beatsin8(10,0,20);
leds[1] = CHSV (random8(),~0,~0);
leds[4] = CHSV (random8(),~0,~0);
leds[12] = CHSV (random8(),~0,~0);
leds[33] = CHSV (random8(),~0,~0);
FastLED.show();
}