/* Red Green Blue Blaster */


int redpin = 11;  // select the pin for the red LED
int bluepin = 10; // select the pin for the blue LED
int greenpin = 9; // select the pin for the green LED


int val;  // variable to store brightness level


void setup() {
 pinMode(redpin, OUTPUT);  // set red LED pin as output
 pinMode(bluepin, OUTPUT); // set blue LED pin as output
 pinMode(greenpin, OUTPUT);// set green LED pin as output
 Serial.begin(9600);       // initialize serial communication at 9600 baud rate
}
/*The value 255 is chosen because Arduino's analogWrite() uses 8-bit PWM, which ranges from 0 to 255.
It allows for 256 levels of brightness control, with 255 representing full brightness.*/
void loop() {
 // Fade from fully bright to off
 for(val = 255; val > 0; val--)  // decrease brightness value from 255 to 0
 {
   analogWrite(11, val);         // set the brightness of red LED
   analogWrite(10, 255 - val);   // set the brightness of blue LED (inversely proportional)
   analogWrite(9, 128 - val);    // set the brightness of green LED (range from 128 to 0)


   Serial.println(val, DEC);     // print the current brightness value in decimal format to Serial Monitor
   delay(50);                     // short delay for smooth fading effect
 }


 // Fade from off to fully bright
 for(val = 0; val < 255; val++)  // increase brightness value from 0 to 255
 {
   analogWrite(11, val);         // set the brightness of red LED
   analogWrite(10, 255 - val);   // set the brightness of blue LED (inversely proportional)
   analogWrite(9, 128 - val);    // set the brightness of green LED (range from 0 to 128)


   Serial.println(val, DEC);     // print the current brightness value in decimal format to Serial Monitor
   delay(50);                     // short delay for smooth fading effect
 }
}