RainbowsV2

#include "FastLED.h"
#include <SPI.h>
#define NumPixels 150       // number of LEDs in strip - count starts at 0, not 1
#define DataRate_Mhz 12
#define DataPin 11
#define ClockPin 13
 
CRGB leds[NumPixels];

int r = 0;
int g = 0;
int b = 0;
int Up, Down;
int Count =0;
int Timer = 10000; //seconds to light up and down


void setup()
{
 FastLED.addLeds<APA102,DataPin,ClockPin,BGR,DATA_RATE_MHZ(DataRate_Mhz)>(leds,NumPixels);
 Serial.begin(115200);                             // set the speed at which serial monitor will write at
 fill_solid(leds, NumPixels, CRGB(0,0,0));         // fill all black
 FastLED.show();                                   // show 
 delay(2000);                                      // saftey first
}

void loop() 
{
for(Up=0; Up<=254; ++Up)                  // adds one at the end so do 254
 {
 switch (Count)
 {
 case 1: ++r; break;      // red
 case 2: ++r; ++g; break; // yellow
 case 3: ++g; break;      // green
 case 4: ++g; ++b; break; // cyan
 case 5: ++b; break;      // blue
 case 6: ++b; ++r; break; // purple
 }
 fill_solid(leds, NumPixels, CRGB(r,g,b)); // light up whole strip
 FastLED.show();                           // show 
 delay(Timer/255);
 Down=255;
 }

for(Down=255; Down>=1; --Down)            //  takes one at the end so do 1
 {
 switch (Count)
 {
 case 1: --r; break;      // red
 case 2: --r; --g; break; // yellow
 case 3: --g; break;      // green
 case 4: --g; --b; break; // cyan
 case 5: --b; break;      // blue
 case 6: --b; --r; break; // purple
 } 
 fill_solid(leds, NumPixels, CRGB(r,g,b)); // light up whole strip
 FastLED.show();                           // show 
 delay(Timer/255);
 Up = 0;
}
 
if(Count>=6)Count=0;
++Count;
Serial.print("Count = "); Serial.println(Count);
}