1. #include <FastLED.h>
2. #define LED_PIN     0
3. #define NUM_LEDS    140
4. int frequency = 0;
5. CRGB leds[NUM_LEDS];
6. //int frequency , amp;
7.  
8.  
9.  
10. void setup() {
11.   Serial.begin(9600);
12.   FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
13.  
14. }
15.  /*
16.   for (int i = 2; i < (SAMPLES/2); i++){       // Don't use sample 0 and only first SAMPLES/2 are usable. Each array element represents a frequency bin and its value the amplitude.
17.      
18.  
19.       if (i>0   && i<=5  ) bandValues[1]  += (int)vReal[i];
20.       if (i>5   && i<=10 ) bandValues[2]  += (int)vReal[i];
21.       if (i>10  && i<=15 ) bandValues[3]  += (int)vReal[i];
22.       if (i>15  && i<=20 ) bandValues[4]  += (int)vReal[i];
23.    
24.   }
25.  
26.   int barHeight = 35;
27.  
28.   for (byte band = 0; band < NUM_BANDS; band++) {
29.  
30.     // Scale the bars for the display
31.     int barHeight = bandValues[band] / AMPLITUDE;
32.     if (barHeight > TOP) barHeight = TOP;
33.  
34.     // Small amount of averaging between frames
35.     barHeight = ((oldBarHeights[band] * 1) + barHeight) / 2;
36.  
37.     // Move peak up
38.     if (barHeight > peak[band]) {
39.       peak[band] = min(TOP, barHeight);
40.     }
41.   int barHeight = 35;
42.  
43.   for (byte band = 0; band < NUM_BANDS; band++) {
44.  
45.     // Scale the bars for the display
46.     int barHeight = bandValues[band] / AMPLITUDE;
47.     if (barHeight > TOP) barHeight = TOP;
48.  
49.     // Small amount of averaging between frames
50.     barHeight = ((oldBarHeights[band] * 1) + barHeight) / 2;
51.  
52.     // Move peak up
53.     if (barHeight > peak[band]) {
54.       peak[band] = min(TOP, barHeight);
55.     }
56. */
57. void loop() {
58.  
59.    if (Serial.available() > 0) {
60.     // read the incoming byte:
61.     frequency = Serial.read();
62.  
63.     // say what you got:
64.     Serial.print("I received: ");
65.     Serial.println(frequency, DEC);
66.   }
67.  
68.   for (int i = 0; i <= 140; i++) {
69.     leds[i] = CRGB ( 0, 0, 255);
70.     FastLED.show();
71.     delay(40);
72.   }
73.  
74. if (frequency>0   && frequency<=5  )
75. {
76. for (int i = 0; i <= 35; i++) {
77.     leds[i] = CRGB ( 0, 0, 255);
78.     FastLED.show();
79.     delay(40);
80.  
81. }
82.  
83. }
84.  
85. if (frequency>5   && frequency<=10  )
86. {
87.  
88. for (int i = 0; i <= 35; i++) {
89.     leds[i] = CRGB ( 0, 0, 255);
90.     FastLED.show();
91.     delay(40);
92. }
93.  
94. for (int i = 35; i <= 70; i++) {
95.     leds[i] = CRGB ( 0, 0, 255);
96.     FastLED.show();
97.     delay(40);
98.  
99. }
100.  
101. }
102.  
103. if (frequency>10   && frequency<=15  )
104. {
105.  
106. for (int i = 0; i <= 35; i++) {
107.     leds[i] = CRGB ( 0, 0, 255);
108.     FastLED.show();
109.     delay(40);
110.  
111. }
112. for (int i = 35; i <= 70; i++) {
113.     leds[i] = CRGB ( 0, 0, 255);
114.     FastLED.show();
115.     delay(40);
116.  
117. }
118.  
119. for (int i = 70; i <= 105; i++) {
120.     leds[i] = CRGB ( 0, 0, 255);
121.     FastLED.show();
122.     delay(40);
123.  
124. }
125.  
126. }
127.  
128. if (frequency >= 25 )
129. {
130.  
131. for (int i = 0; i <= 35; i++) {
132.     leds[i] = CRGB ( 0, 0, 255);
133.     FastLED.show();
134.     delay(40);
135.  
136. }
137. for (int i = 35; i <= 70; i++) {
138.     leds[i] = CRGB ( 0, 0, 255);
139.     FastLED.show();
140.     delay(40);
141.  
142. }
143.  
144. for (int i = 70; i <= 105; i++) {
145.     leds[i] = CRGB ( 0, 0, 255);
146.     FastLED.show();
147.     delay(40);
148.  
149. }
150.  
151. for (int i = 105; i <= 140; i++) {
152.     leds[i] = CRGB ( 0, 0, 255);
153.     FastLED.show();
154.     delay(40);
155.  
156. }
157.  
158. }
159.  
160.  
161. }