Need help in the problem with analog input readings and RTC DS3231

Question

I have 3 analog input(0-1024). I want two outputs based on levels of analog inputs. Eg. inputs have 2 levels. for A0 at 300,digital output pin3 turns ON; and A0 at 500, digital output pin 4 turns ON. Similar for all analog inputs have two levels. Digital output pin 3 turns ON for 1st level and for 2nd level, pin 4 should turn ON. Both should not turn ON at same time. Also, pin 3, should turn ON for specific time in a day for 1 hour.

Problem Facing: (1) I tried this program but outputs doesnt switch according to levels of analog inputs. Once Pin 3 turns ON, it doesnt let pin4 to turn ON. Also, after removing analog inputs, LED remains ON as it is (2) RTC doesnt turn ON on correct time.

#include<DS3231.h>
#include<Wire.h>
DS3231 rtc(SDA,SCL);
Time t;
const int OnHour=15;  // specified time to turn pin3 ON
const int OnMin=26;
const int OffHour=15;
const int OffMin=28;
int CO2=0;
int Temp=0;
int Humidity=0;

void setup() {

Serial.begin(115200);
rtc.begin();
for(int i=2;i<6;i++){
  pinMode(i, OUTPUT);
}
 }

void loop() {
  t=rtc.getTime();
  delay(1000);
  CO2=analogRead(A0);   //analog input 1
  Temp=analogRead(A1);   //analog input 2
  Humidity=analogRead(A2); //analog input 3

  if((CO2>500)&&(CO2<700)) //500 is low level and 700 is high level
  {
    digitalWrite(2,HIGH);  //indicator LED for low level
    digitalWrite(4,HIGH);  //actual output for low level
    digitalWrite(3,LOW);   //indicator LED for high level
    digitalWrite(5,LOW);   //actual output for high level


  }
  else if(CO2>700) //700 is high level
  {
    digitalWrite(3,HIGH);
    digitalWrite(5,HIGH);
    digitalWrite(2,LOW);
    digitalWrite(4,LOW);

  }

  if((Temp>450)&&(Temp<600))
  {
    digitalWrite(4,HIGH);
    digitalWrite(2,HIGH);
    digitalWrite(3,LOW);
    digitalWrite(5,LOW);

  }
  else if(Temp>600)
  {
    digitalWrite(3,HIGH);
    digitalWrite(5,HIGH);
    digitalWrite(2,LOW);
    digitalWrite(4,LOW);

  }

  if((Humidity>300)&&(Humidity<850))
  {
    digitalWrite(4,HIGH);
    digitalWrite(2,HIGH);
    digitalWrite(3,LOW);
    digitalWrite(5,LOW);

  }
  else if(Humidity>850)
  {
    digitalWrite(5,HIGH);
    digitalWrite(3,HIGH);
    digitalWrite(2,LOW);
    digitalWrite(4,LOW);

  }

  if (t.hour==OnHour && t.min==OnMin)
  {
    digitalWrite(2,HIGH);
    digitalWrite(4,HIGH);
    digitalWrite(3,LOW);
   digitalWrite(5,LOW);

  }
  else if(t.hour==OffHour && t.min==OffMin)
  {
    digitalWrite(2,LOW);
    digitalWrite(4,LOW);
    digitalWrite(3,LOW);
    digitalWrite(5,LOW);

 } 
}