//leaf

#define COLS 6
//how many lights

int pinarray[] = {3,5,6,9,10,11};
//array of all the lights 
volatile uint8_t duty[COLS]; //byte of duty, either 1 or 0

int limit = RAND_MAX/10; //will be used later 

uint8_t state[COLS];
uint8_t max_bright[COLS];

uint8_t run = 0;
uint32_t brightCalc;

void setup(){
  pinMode(0,OUTPUT);
  pinMode(1,OUTPUT);
  pinMode(2,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(6,OUTPUT);
  pinMode(7,OUTPUT);
  pinMode(8,OUTPUT);
  
}

void loop(){
  
  if(run == COLS) //kk keep cycling 
  run = 0;
  
  uint16_t rand = abs(random());
  uint8_t lightIt = (rand < limit) ? 1 : 0; //1/10 times lightIt == 1
  
  if(((lightIt == 1) && (state[run] == 0))){ //if not on already
  state[run] = 1;
  brightCalc = (((uint32_t)rand * 128) / limit ) ;
  max_bright[run] = (uint8_t)brightCalc + 10;
  }
  
  uint8_t i;
  
     for(i=0; i<COLS; i++) {
        //increment duty of all LEDs in state 1 by 1 (make it brighter)
        if(state[i] == 1){
	  analogWrite(pinarray[i], duty[i] + 1);
          duty[i] = duty[i] + 1;
          //switch to state 2 once we reach max brightness
  	  if(duty[i] == max_bright[i]){
		state[i] = 2;
	  }
         //decrement duty of all LEDs in state 2
        } else if(state[i] == 2) {
	   analogWrite(pinarray[i], duty[i] - 1);
           duty[i] = duty[i] - 1;
           //return to state 0 once we reach bottom of brightness
           if(duty[i] == 9) 
		state[i] = 0;
        }
     }

  
     delay(20);
     run++;
}