Led RGB, with Arduino

1
2// Define Pins
3#define BLUE 3
4#define GREEN 5
5#define RED  6
6
7void setup()
8{
9pinMode(RED, OUTPUT);
10pinMode(GREEN, OUTPUT);
11pinMode(BLUE,  OUTPUT);
12digitalWrite(RED, HIGH);
13digitalWrite(GREEN, LOW);
14digitalWrite(BLUE,  LOW);
15}
16
17// define variables
18int redValue;
19int greenValue;
20int  blueValue;
21
22// main loop
23void loop()
24{
25#define delayTime 10 // fading  time between colors
26
27redValue = 255; // choose a value between 1 and 255 to  change the color.
28greenValue = 0;
29blueValue = 0;
30
31// this is unnecessary  as we've either turned on RED in SETUP
32// or in the previous loop ... regardless,  this turns RED off
33// analogWrite(RED, 0);
34// delay(1000);
35
36for(int  i = 0; i < 255; i += 1) // fades out red bring green full when i=255
37{
38redValue  -= 1;
39greenValue += 1;
40// The following was reversed, counting in the wrong  directions
41// analogWrite(RED, 255 - redValue);
42// analogWrite(GREEN, 255  - greenValue);
43analogWrite(RED, redValue);
44analogWrite(GREEN, greenValue);
45delay(delayTime);
46}
47
48redValue  = 0;
49greenValue = 255;
50blueValue = 0;
51
52for(int i = 0; i < 255; i +=  1) // fades out green bring blue full when i=255
53{
54greenValue -= 1;
55blueValue  += 1;
56// The following was reversed, counting in the wrong directions
57// analogWrite(GREEN,  255 - greenValue);
58// analogWrite(BLUE, 255 - blueValue);
59analogWrite(GREEN,  greenValue);
60analogWrite(BLUE, blueValue);
61delay(delayTime);
62}
63
64redValue  = 0;
65greenValue = 0;
66blueValue = 255;
67
68for(int i = 0; i < 255; i +=  1) // fades out blue bring red full when i=255
69{
70// The following code has  been rearranged to match the other two similar sections
71blueValue -= 1;
72redValue  += 1;
73// The following was reversed, counting in the wrong directions
74// analogWrite(BLUE,  255 - blueValue);
75// analogWrite(RED, 255 - redValue);
76analogWrite(BLUE, blueValue);
77analogWrite(RED,  redValue);
78delay(delayTime);
79}
80}
81
82