Double Rainbow

#define R_LED RED_LED
#define G_LED GREEN_LED
#define B_LED BLUE_LED

const int switchPin = 5;   

 
int direction = -1; 
int max = 256; 
int speed_multiplier = 20;

void setup() {

  Serial.begin(9600);

  //Setup pinmodes for LEDs and Tilt_Switch
  pinMode(R_LED, OUTPUT); 
  pinMode(B_LED, OUTPUT); 
  pinMode(G_LED, OUTPUT);   
  pinMode(switchPin, INPUT_PULLUP);
  
}

void loop() {

  //initialise LED variables 
  float red_value = 255;
  float green_value = 0;
  float blue_value = 0;

  //counter for fade loop
  int counter = 0;

  //reversing counter direction
   if(direction == -1){
      counter = 255;
   }

  //main fade loop
  for(counter; counter < max; counter += direction){
    //checking if tilt switch is tilted
    int tiltState = digitalRead(switchPin);

    //if tilt switch is tilted, go in reverse
    if(tiltState == LOW){
      direction = -1;    
    }
    else
    {
      direction = 1;
    }
    //delaying the loop to control fade speed
    delay(speed_multiplier);

    //adjusting values for LEDs 
    if(counter < 32){
        red_value = red_value - (21.0/8.0) * direction; 
        green_value = green_value + (85.0/32.0) * direction; 
    } else if (counter > 31 && counter < 64){
          green_value = green_value + (42.0/16.0) * direction; 
    } else if (counter > 63 && counter < 96){
        red_value = red_value - (171.0/32.0)* direction;
        green_value = green_value + (21.0/8.0)* direction;
    } else if (counter > 95 && counter < 128){
        green_value = green_value - (21.0/8.0)* direction;
        blue_value = blue_value + (85.0/32.0)* direction;
    }else if (counter > 127 && counter < 160){
        green_value = green_value - (171.0/32.0)* direction;
        blue_value = blue_value + (170.0/32.0)* direction;
    } else if (counter > 159 && counter < 192){
        red_value = red_value + (85.0/32.0)* direction;
        blue_value = blue_value - (21.0/8.0)* direction;
    } else if (counter > 191 && counter < 224){
        red_value = red_value + (43.0/16.0)* direction;
        blue_value = blue_value - (43.0/16.0)* direction;
    } else if (counter > 223 && counter < 256){
        red_value = red_value + (21.0/8.0)* direction;
        blue_value = blue_value - (85.0/32.0)* direction;
    }

    //ensuring values cannot go below zero
    if(red_value < 0){
      red_value = 0;
    }
    if(blue_value < 0){
      blue_value = 0;
    }
    if(green_value < 0){
      green_value = 0;
    }

    //ends loop if counter goes below zero - if the direction is reversed
    if(counter < 0){
      break;
    }
        
        // Output values to LEDs
        analogWrite(R_LED, (int)red_value);
        analogWrite(G_LED, (int)green_value);
        analogWrite(B_LED, (int)blue_value);

  }  
  
}