Ok new to Ardiuno's Been using Raspberry Pi's and scripts. So please no laughing (to much)at my programing (I'm def a noob) 
Can some one explain why is this taking up a lot of memory on my nano?
#include <FastLED.h>
#define NUM_LEDS 150
#define NUM1_LEDS 150
#define NUM2_LEDS 150
#define DATA_PIN 2
#define DATA1_PIN 3
#define DATA2_PIN 6
CRGB leds[NUM_LEDS];
CRGB redleds[NUM_LEDS];
CRGB blueleds[NUM_LEDS];
CRGB whiteleds[NUM_LEDS];
void setup() {
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
FastLED.addLeds<NEOPIXEL, DATA1_PIN>(blueleds, NUM1_LEDS);
FastLED.addLeds<NEOPIXEL, DATA2_PIN>(redleds, NUM2_LEDS);
}
void loop() {
for (int dot = 0; dot < NUM_LEDS; dot++) {
leds[dot] = CRGB::Blue;
blueleds [dot] = CRGB::Purple;
FastLED.show();
// clear this led for the next time around the loop
leds[dot] = CRGB::Black;
blueleds [dot] = CRGB::Black;
delay(3);
}
}