Automatic Humidifier

// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
#include "Adafruit_NeoPixel.h"
#ifdef __AVR__
  #include <avr/power.h>
#endif

#define PIN            7
// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS      20
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

#include "DHT.h"

// Uncomment whatever type you're using!
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT11   // DHT 22  (AM2302)
//#define DHTTYPE DHT21   // DHT 21 (AM2301)
//#define DHTTYPE DHT10   // DHT 10
//#define DHTTYPE DHT20   // DHT 20

/*Notice: The DHT10 and DHT20 is different from other DHT* sensor ,it uses i2c interface rather than one wire*/
/*So it doesn't require a pin.*/
#define DHTPIN 5     // what pin we're connected to（DHT10 and DHT20 don't need define it）
DHT dht11(DHTPIN, DHTTYPE);   //   DHT11 DHT21 DHT22
 
int delayval = 500; // delay for half a second



#if defined(ARDUINO_ARCH_AVR)
    #define debug  Serial

#elif defined(ARDUINO_ARCH_SAMD) ||  defined(ARDUINO_ARCH_SAM)
    #define debug  SerialUSB
#else
    #define debug  Serial
#endif
// Pin Definitions   

// Variable Definitions
int sensorValue = 0;  

void setup() {
    Serial.begin(9600);
    pinMode(0,OUTPUT); //Set pin 4 as OUTPUT pin
    dht11.begin();

#if defined (__AVR_ATtiny85__)
  if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
#endif
  // End of trinket special code
  pixels.setBrightness(255);
  pixels.begin(); 

  
    
}
void loop() {
    // read the value from soil moisture sensor:
    sensorValue = dht11.readHumidity();
  
    Serial.println(sensorValue);

    // determine when to open the relay:
    if(sensorValue<90){
      digitalWrite(0,HIGH);
           
    for(int i=0;i<NUMPIXELS;i++){
 
    // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
    pixels.setPixelColor(i, pixels.Color(0,150,0)); // Moderately bright green color.
 
    pixels.show(); // This sends the updated pixel color to the hardware.
 
    delay(10); // Delay for a period of time (in milliseconds).
 
  }
    }
    
    else{
      digitalWrite(0,LOW);
           
    for(int i=0;i<NUMPIXELS;i++){
 
    // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
    pixels.setPixelColor(i, pixels.Color(0,150,150)); // Moderately bright green color.
 
    pixels.show(); // This sends the updated pixel color to the hardware.
 
    delay(10); // Delay for a period of time (in milliseconds).
 
  }
      
    }
    //read the value every 10 minutes
    delay(10);
}